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Airworthiness Directives; General Electric Company (GE) CF6-45, -50, -80A, -80C2, and -80E1 Turbofan Engines

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Information about this document as published in the Federal Register.

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Start Preamble

AGENCY:

Federal Aviation Administration, DOT.

ACTION:

Final rule.

SUMMARY:

This amendment supersedes three existing airworthiness directives (AD's), that are applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines. Those AD's currently require specific handling of the GE CF6 series high pressure compressor rotor (HPCR) stage 3-9 spools during a fluorescent penetrant inspection process, and initial and repetitive ultrasonic and eddy current inspections of certain HPCR stage 3-9 spools for cracks. This amendment removes the AD that requires special handling of the spools during fluorescent-penetrant inspection, and adjusts and combines the initial and repetitive inspection requirements, currently listed in two AD's, into one AD for the HPCR stage 3-9 spool. This amendment aligns repetitive inspection requirements with the more stringent initial inspection requirements mandated by AD 2000-16-12, Amendment 39-11868 (65 FR 50623, August 21, 2000) and terminates AD 95-18-14, Amendment 39-9361 (60 FR 46216, September 6, 1995) that is no longer necessary. The actions specified by this AD are intended to prevent cracks, which can cause separation of the HPCR stage 3-9 spool and possible uncontained engine failure.

DATES:

Effective January 23, 2003. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of January 23, 2003.

ADDRESSES:

The service information referenced in this AD may be obtained from General Electric Company via Lockheed Martin Technology Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215, telephone (513) 672-8400, fax (513) 672-8422. This information may be examined, by appointment, at the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

Start Further Info

FOR FURTHER INFORMATION CONTACT:

Chris Gavriel, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-7147; fax (781) 238-7199.

End Further Info End Preamble Start Supplemental Information

SUPPLEMENTARY INFORMATION:

A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) by superseding AD 95-18-14, Amendment 39-9361 (60 FR 46216, September 6, 1995); AD 99-24-15, Amendment 39-11440 (64 FR 66554, November 29, 1999); and AD 2000-16-12, Amendment 39-11868 (65 FR 50623, August 21, 2000); which are applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines, was published in the Federal Register on June 12, 2002, (67 FR 40239). That action proposed to combine the requirements of AD 99-24-15 and AD 2000-16-12 with the following additional changes to:

  • Adopt the accelerated initial inspection requirements of AD 2000-16-12 to spools acquiring 7,000 cycles-since-new (CSN) or more in service after July 28, 2001,
  • Relax initial compliance requirement for the CF6-45, -50, and CF6-80A 13-inch billet spools to make them consistent with 9 and 10-inch billet spools,
  • Add repetitive inspection requirements to the existing one-time inspection requirement for the CF6-80C and -80E series engine spool web and hub-to-web transition areas,
  • Replace engine shop visit inspection threshold limits for certain spools with cyclic limits,
  • Add a time limit for slot bottom inspection for 13-inch billet spools for CF6-45, -50, -80A engines and for 9-inch and 10-inch billet spools for CF6-45, -50, -80A, and -80C engines,
  • Add a time limit for the initial inspection and add repeat inspection intervals for stage 3-5 slot bottom inspection for certain spools,
  • Add a time limit for one-time inspection of 8-inch billet 2-piece spools, and
  • Provide for an alternative modular inspection for the slot bottoms. Start Printed Page 77654

The action was prompted by a report of an uncontained failure of an HPCR 3-9 spool.

The inspections must be done in accordance with the following GE alert service bulletins (ASB's):

  • ASB GE CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002.
  • ASB GE CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002.
  • ASB GE CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002.
  • ASB GE CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.
  • ASB GE CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002.
  • ASB GE CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002.
  • ASB GE CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.
  • ASB GE CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002.
  • ASB GE CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002.
  • ASB GE CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002.
  • ASB GE CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002.
  • ASB GE CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002.

Comments

Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the comments received.

Web Inspection May Require Unscheduled Removals of Engines

Several commenters state that inspection of the web per Alert Service Bulletin 72-A0848, after January 27, 2003, at 3,500 CSN is a decrease from inspection requirements prior to that date. The commenters feel that this requirement will force operators to remove engines off wing to do the inspection in order to comply with this proposed AD.

The FAA agrees. Based on information received from several commenters, this requirement will have an adverse economic and operational impact on several operators. We have reviewed a risk analysis that includes an extension of the web inspection requirement by six months, relative to the date proposed in the NPRM, and find that the new risk is still acceptable under the guidelines appropriate for this type of failure. As a result, the requirement has been extended by six months.

Request To Add a FAX Number for the Reporting Requirements

One commenter requests that a FAX number be added to the reporting requirements. Due to time differences around the world, the time allotted for reporting may not be sufficient for other means of communication

The FAA agrees. We have added a facsimile number to the reporting requirements.

Request To Make Editorial Changes to Wording in the Requirements of the AD

One commenter requests certain word changes, such as replacing “by” with “at”, replacing “within” with “before”, etc., and adding certain paragraph headings. These changes are requested to make the AD requirements consistent and more understandable.

The FAA partially agrees. We consider the consistency of wording and the readability of the requirements of the AD to be of highest concern. However, we also feel that many of the suggested changes are stylistic and do not affect the technical accuracy or readability of the AD. We have made some of the requested changes to ensure consistency among the requirements and to improve the readability of the requirements of the AD.

Requested Corrections to CF6-50 8-Inch Requirements

Several commenters request that the title for paragraph (d) be corrected from “CF6-508-inch” to “CF6-50 8-inch.” The same commenters also request that the FAA correct service bulletin identifications in paragraphs (f), (g), and (j).

The FAA agrees. The title for paragraph (d) and the service bulletin numbers in paragraphs (f), (g), and (j) have been corrected.

Request To Change the Definition of an Engine Shop Visit

Several commenters request that the definition of an engine shop visit be changed to exclude compressor top and bottom case removals for variable stator vane bushing replacements. The commenters feel the inclusion was made to add another condition to the conditions already identified as not constituting engine shop visits (ESV's).

The FAA agrees. We have changed the ESV definition paragraph to exclude the induction of an engine into the shop for the purpose of replacing the variable stator vane bushing.

Requested Clarification of the Requirements for Reinstallation of CF6-50 Spools

One commenter feels that further explanation on the meaning of paragraph (c)(7) is needed.

The FAA agrees. Addition of a heading “Spool Reinstallation Limit” in this paragraph helps in clarifying the intent of this paragraph. Furthermore, as the paragraph states, an engine with a spool that has 10,500 CSN or more may not be installed (i.e. returned to service). The paragraph does not require the removal of an installed engine that has a spool with 10,500 CSN or more.

Request To Clarify Paragraph (a)(3)(ii) of This AD

One commenter requests clarification of paragraph (a)(3)(ii). The commenter feels that paragraph (a)(3)(ii) is necessary to do paragraphs (a)(3)(i) and (a)(3)(iii). The commenter feels that paragraphs (a)(3)(i) and (a)(3)(iii) are redundant to (a)(3)(ii) and can be deleted to simplify the requirements.

The FAA does not agree with deleting paragraphs (a)(3)(i) and (a)(3)(iii). A spool that is exposed as a piece part (paragraph (a)(3)(i)) is also exposed as a rotor (paragraph (a)(3)(ii)). Likewise, a spool that requires a hub inspection in accordance with ASB CF6-50 S/B 72-A1108 hub inspection (paragraph (a)(3)(iii)) must be exposed at least to a rotor level {(a)(3)(ii)} in order to do a module level inspection. In this sense, (a)(3)(i) and (a)(3)(iii) are redundant to (a)(3)(ii). However, each condition represents a common but distinct and different level of planned engine maintenance, therefore it was advisable to address each condition specifically for clarity.

Request To Clarify That Paragraph (a)(4)(iii) Is Correct

One commenter requests that the FAA verify that paragraph (a)(4)(iii) and Table 5 are correct. The commenter feels that Table 5 of the AD causes a jump in the inspection interval. The commenter provides a correction to Table 5 of the AD to correct a perceived error in that Table.

The FAA has not been able to confirm the commenter's findings. The cyclic intervals for the Table 5 requirements are A; 3,500 cycles, B; 3,000 cycles, C; 3,000 cycles, D; 2,500 cycles, E; 2,500 cycles, F; 2,000 cycles, and G; 2,000 cycles. These intervals are as intended.

Concern About Misinterpretation of the Inspection Deadline

One commenter states that one of the requirements of this proposed rule may be misread as extending the inspection deadline of AD 2000-16-12 to beyond July 28, 2001. The commenter also suggests that if all the high-risk spools have been inspected, the proposed rule should be expedited, since one year has passed since the deadline of AD 2000-16-12. Start Printed Page 77655

The FAA agrees with the commenter on the need to expedite issuance of this AD. While the statement in the Discussion Section of the preamble of the proposal may be misinterpreted, the preamble is not regulatory and in fact, even the structure of the preamble changes when an NPRM is converted into a final rule. However, we have made changes to the statement in the Supplementary Information section to clarify the intent of this final rule. The intent of the proposed rule is to apply the same requirement on the population of the spools that would acquire 7,000 CSN after July 28, 2001. In regard to the comment inquiring if all spools have been inspected, we are not aware of any spool with 7,000 CSN or more that has not been inspected as required by AD 2000-16-12.

Request To Include Fluorescent Penetrant Inspection (FPI) Requirements

One commenter suggests that AD 95-18-14 that addresses FPI of the 3-9 spool should be included, since Standard Practices are only a suggestion and not a law. The commenter makes this comment out of concern that under this proposed rule the benefit of an additional inspection is eliminated.

The FAA does not agree. The requirements promulgated by AD 95-18-14 ensure that a spool is properly wetted internally prior to the FPI. Although FPI of the 3-9 spool is desired for the areas not affected by this AD, FPI is not the best technique for the inspection program established by this AD. While FPI is effective only for detection of surface cracks, the combination of ultrasonic and eddy current inspections required by this AD provide both surface and subsurface inspections that are of equal or greater sensitivity than FPI. The FPI required by AD 95-18-14 was an emergency measure instituted in 1995 after discovery of cracking in the disk web area, an area not then covered by ultrasonic and eddy current inspections. These inspection methods were subsequently developed and incorporated into the inspection plan. Additionally, AD 95-18-14 did not prescribe inspection intervals, only inspection techniques, therefore, the benefit of AD 95-18-14 was not considered in the risk analysis associated with the current AD's.

Additional Spool Part Numbers (P/N's) as a Result of Unrelated Repairs

One commenter expresses a concern that additional spool P/N's, which have been generated due to unrelated repairs on spools that are subject to the inspection requirements of this AD, are not being captured by the AD. The commenter feels that these P/N's should be added to the AD. The commenter raises this issue to ensure that spools with P/N's that were not included in the proposed rule are not excluded from this inspection program.

The FAA agrees. The new P/N's will be incorporated in this AD. However, their incorporation does not increase the originally affected spool population size.

New Revisions to the Applicable Service Bulletins

One commenter, the manufacturer, advises the FAA that the applicable service bulletins may be revised for nontechnical reasons. The commenter feels that the latest revisions of the service bulletins need to be incorporated into the AD.

The FAA agrees. The revision numbers and dates have been incorporated into this final rule.

Request To Change Paragraph (j)(2)

One commenter requests that paragraph (j)(2) be changed to ensure that the hub and web receive an initial inspection if either of the two areas were not previously inspected. The same commenter suggests that paragraph (j)(2) be split into two paragraphs to properly specify the inspection deadlines for the hub and for the web, now that the originally proposed deadlines have been changed to accommodate the economic and operational burden associated with the web inspection.

The FAA agrees. We have changed paragraph (j)(2) of this AD. Because of the new schedule requirements, two paragraphs, each with its own schedule, are appropriate and the change has been made.

Request To Clarify “Replace Before Further Flight” Requirement on CF6-50 Spools

One commenter observes that the “replace before further flight” requirements for the CF6-50 spools include the reject limits of service bulletin CF6-50 S/B 72-A1131, while the preceding paragraph does not include this service bulletin. The commenter raised this comment out of concern that the inspection requirement per service bulletin CF6-50 S/B 72-A1131 was not identified in the preceding step.

The FAA partially agrees. In the current text, an inference may be made that spools must be inspected to all three referenced bulletins at each repeat inspection. The spool disposition requirements apply to results of all prescribed inspections specified in all the steps of the pertinent paragraph in the AD and not just to the preceding step. Therefore, for further clarification a heading “Spool Disposition” has been inserted.

Request To Add a Heading of “Spool Reinstallation Limit”

One commenter requests that the heading Spool Reinstallation Limit be added before the applicable paragraphs. The commenter feels that the addition will clarify the intent of the paragraphs.

The FAA agrees. We have added the heading to the applicable paragraphs.

Concern Over the Availability of Training and Equipment

One commenter expresses concern that the requirements of ASB CF6-80C2 72-A0934, Revision 3, can not be done because the equipment and training necessary to carry out this inspection are not available at this time. The commenter makes this comment out of concern that the prescribed inspections could not be done, per the proposed rule timetables, since there was no scheduled delivery of the necessary equipment and associated training.

The FAA agrees. However, this issue has been addressed by the engine manufacturer. Both equipment and training will be available in time to enable the commenter to comply with the requirements of this AD, therefore, no changes have been made.

Request To Change the Definition of a Shop Visit

One commenter states that the introduction of an engine into the shop solely for the 3-9 spool inspection should not be considered a shop visit. The request is made so that the stage 3-5 dovetail slot bottom inspection for the CF6-80C2 13-inch billet spools would not be forced if the spools could otherwise comply using the module level inspection. The hub and web inspections can be done at module level merely by removing the fan module from the core. The slot bottom inspection requires additional disassembly to remove the compressor top case. The request is made to avoid this additional disassembly.

The FAA disagrees. Material testing and stress analysis indicate that the dovetail slot bottoms have a dwell-fatigue limitation. Accordingly, the rule requires initial slot bottom inspection at the earliest exposure (piece-part exposure or rotor exposure, which is realized upon top case removal) but not later than the next required inspection of the hub and/or web for dwell fatigue Start Printed Page 77656cracking. As the cracking mode is the same for all areas, the FAA can not apply lesser criteria to the slot bottoms.

Request To Include the 3-5 Dovetail Slot Bottom Inspection at Piece-Part Level Only

One commenter requests that the repeat inspection of the CF6-80C 13-inch billet spool stage 3-5 dovetail slot bottoms be required at piece-part exposure only. Accomplishment of this inspection at a module level would require, at a minimum, the removal of the compressor top case.

The FAA disagrees for reasons stated in the answer to the previous comment.

Request To Clarify the Reference Date for the Initial Inspection

One commenter states that there is no reference date for the initial inspection required in paragraph (a)(3) from which the operator is to determine items (i), (ii), and (iii) under this paragraph. The commenter uses the example that item (i) requires an inspection at the first piece-part exposure (PPE) after 1,000 CSN. The spool may have had several PPE's after 1,000 CSN in its life but never had the requirement to inspect at those visits. The commenter requests clarification of the reference date in this paragraph to ensure the proper time set.

The FAA disagrees. The proposal does not contain new requirements. It consolidates requirements of existing airworthiness directives, which include paragraph (a)(3). In the past, if an opportunity to have a PPE arose as the commenter states, the requirement of AD 99-24-15 would have been applicable. Additionally, the cyclic requirements of steps (i) and (ii) are associated with the cyclic life of the spool and not an independent cyclic interval. The third step (iii) also does not need the association with the effective date of this AD. Incorporation of the change the commenter proposes would conflict with requirements of the existing AD relative to the dovetail inspection. The proposed change would also affect additional paragraphs of the rule, not identified by the commenter, where similar arguments can be made.

Potential Confusion Over Requirements for Piece-Part Inspections

One commenter, the manufacturer, informs the FAA that a potential for confusion exists regarding the requirements for the one-time hub inspection of 8-inch billet spools. The existing wording in certain ASB's could be interpreted such that a modular level inspection of the hub could be performed, when in fact, piece-part inspection using Procedure A is required to achieve the intended level of safety. The manufacturer has revised the appropriate ASB's to add this clarification and suggests additional wording be added to this rule to ensure the correct procedure is used.

The FAA agrees. We have clarified the hub inspection requirements for affected spools in paragraphs (d)(1), (h)(1), (k)(1), and (m)(1).

Request To Correct P/N's and SN's for CF6-50 16-Inch and 13-Inch Billets

The same commenter states that the part number and serial number relationships for the CF6-50 16-inch and 13-inch billet spools relative to Table 2 were incorrect in the information that it sent to the FAA and need to be corrected in paragraphs (a) and (b), respectively.

The FAA agrees. We have made the appropriate changes to the final rule.

After careful review of the available data, including the comments noted above, the FAA has determined that air safety and the public interest require the adoption of the rule with the changes described previously. The FAA has determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD.

Cost Analysis

There are approximately 3,147 engines of the affected design in the worldwide fleet. The FAA estimates that 1,289 engines installed on airplanes of U.S. registry would be affected by this proposed AD. The FAA also estimates that it would take approximately 238 work hours per engine to perform the proposed actions. The average labor rate is $60 per work hour. Required parts would cost approximately $35,000 per engine. In addition, because of the previous AD actions, the FAA estimates that only 72 percent (928 engines) of the engines installed on airplanes of U.S. registry would be affected. Based on these figures, the total cost of the proposed AD on U.S. operators is estimated to be $45,731,840.

Regulatory Analysis

This final rule does not have federalism implications, as defined in Executive Order 13132, because it would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Accordingly, the FAA has not consulted with state authorities prior to publication of this final rule.

For the reasons discussed above, I certify that this action (1) is not a “significant regulatory action” under Executive Order 12866; (2) is not a “significant rule” under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption ADDRESSES.

Start List of Subjects

List of Subjects in 14 CFR Part 39

End List of Subjects

Adoption of the Amendment

Start Amendment Part

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (

End Amendment Part Start Part

PART 39—AIRWORTHINESS DIRECTIVES

End Part Start Amendment Part

1. The authority citation for part 39 continues to read as follows:

End Amendment Part Start Authority

Authority: 49 U.S.C. 106(g), 40113, 44701.

End Authority
[Amended]
Start Amendment Part

2. Section 39.13 is amended by removing Amendments 39-9361 (

End Amendment Part

2002-25-08 General Electric Company (GE): Docket No. 2001-NE-26-AD. Supersedes AD 95-18-14, Amendment 39-9361; AD 99-24-15, Amendment 39-11440; and AD 2000-16-12, Amendment 39-11868.

Applicability: This airworthiness directive (AD) is applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines with high pressure compressor rotor (HPCR) stage 3-9 spools with part numbers (P/N's) listed in the following Table 1 installed: Start Printed Page 77657

Table 1

Engine modelHPCR stage 3-9 spool P/N
CF6-45/50 Series Engines9136M89G02, 9136M89G03, 9136M89G06, 9136M89G07, 9136M89G08, 9136M89G09, 9136M89G17, 9136M89G18, 9136M89G19, 9136M89G21, 9136M89G22, 9136M89G27, 9136M89G29, 9253M85G01, 9253M85G02, 9273M14G01, 9331M29G01.
CF6-80A Series Engines9136M89G10, 9136M89G11, 9136M89G20, 9136M89G21, 9136M89G22, 9136M89G27, 9136M89G28
CF6-80C2 Series Engines1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1333M66G10, 1781M52P01, 1781M52P02, 1781M53G01, 1781M53G02 1781M53G03, 1781M53G04, 1781M53G05, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1781M53G10, 1854M95P01, 1854M95P02, 1854M95P03, 1854M95P04, 1854M95P05, 1854M95P06, 1854M95P07, 1854M95P08, 9380M28P05.
CF6-80E1 Series Engines1669M22G01, 1669M22G03, 1782M22G01, 1782M22G02, 1782M22G04.

These engines are installed on, but not limited to, Airbus A300, A310, and A330 series, Boeing 747 and 767 series, and McDonnell Douglas DC-10 and MD-11 series airplanes.

Note 1:

This AD applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (p) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance: Compliance with this AD is required as indicated, unless already done.

To detect cracks, which can cause separation of the HPCR stage 3-9 spool and possible uncontained engine failure, do the following:

CF6-45 and -50 16-Inch Billet Spools

(a) For CF6 HPCR stage 3-9 spool, part numbers (P/N's) 9136M89G02 and 9136M89G06; and for P/N's 9136M89G08, 9253M85G02, 9273M14G01, 9331M29G01 with serial numbers (SN's) listed in the following Table 2, do the following:

Table 2

MPOE3486MPOE3487MPOE3488MPOE3489MPOE3490MPOE3491MPOE3492
MPOG3832MPOG3833MPOG3834MPOG3835MPOG3836MPOG3837MPOG3838
MPOG3839MPOG3840MPOG3841MPOG3842MPOG3843MPOG3844MPOG3845
MPOG3846MPOG3847MPOG3848MPOG3850MPOG3851MPOG5228MPOG5230
MPOG5231MPOG5232MPOG6216MPOG6727MPOG6728MPOG6729MPOG6730
MPOG6731MPOG6732MPOG6733MPOG6735MPOG6736MPOG6738MPOG6739
MPOG6740MPOG6741MPOG6742MPOG6743MPOG6744MPOG6745MPOG6746
MPOG7713MPOG7714MPOG7715MPOG7716MPOG7717MPOG7718MPOG7719
MPOG7720MPOG7721MPOG7722MPOG7723MPOG7724MPOG7725MPOG7726
MPOG7727MPOG7728MPOG7729MPOG7730MPOG7731MPOG7732MPOG7733
MPOG7734MPOG7735MPOG7736MPOG7737MPOG7738MPOG7739MPOG7740
MPOG7741MPOG7742MPOG7743MPOG7744MPOG7819MPOG7820MPOG7821
MPOG7822MPOG7823MPOG7824MPOG7825MPOG7826MPOG7827MPOG7828
MPOG7829MPOG7830MPOG7831MPOG7832MPOG7833MPOG7834MPOG7835
MPOG7836MPOG7837MPOG7838MPOG7839MPOG8822MPOG8823MPOG8824
MPOG8825MPOG8826MPOG8827MPOG8828MPOG8829MPOG8830MPOG8831
MPOG8832MPOG8833MPOG8834MPOG8835MPOG8836MPOG8837MPOG9185
MPOG9186MPOH0289MPOH0290MPOH0291MPOH0292MPOH0293MPOH0294
MPOH0295MPOH0296MPOH0297MPOH0298MPOH0299MPOH0300MPOH0301
MPOH0302MPOH0303MPOH0304MPOH0305MPOH1805MPOH2040MPOH2041
MPOH2042MPOH2043MPOH2044MPOH2045MPOH2046MPOH2047MPOH2048
MPOH2049MPOH2050MPOH2051MPOH2052MPOH2053MPOH2054MPOH2055
MPOH2056MPOH2057MPOH2058MPOH2059MPOH2060MPOH2061MPOH2062
MPOH2829MPOH2830MPOH2831MPOH2832MPOH2833MPOH2834MPOH2835
MPOH2836MPOH2837MPOH2838MPOH2839MPOH2840MPOH2841MPOH2842
MPOH2843MPOH2844MPOH2845MPOH2846MPOH2847MPOH2848MPOH2849
MPOH2850MPOH2851MPOH2852MPOH2853MPOH2854MPOH2855MPOH2856
MPOH2857MPOH2858MPOH4307MPOH4308MPOH4309MPOH4310MPOH4311
MPOH4312MPOH4313MPOH5277MPOH5278MPOH5279MPOH5280MPOH5281
MPOH5282MPOH5283MPOH5520MPOH5530MPOH5531MPOH5532MPOH5533
MPOH5534MPOH5535MPOH5536MPOH5537MPOH5538MPOH5539MPOH5540
MPOH5541MPOH5542MPOH5543MPOH5544MPOH5545MPOH5546MPOH5547
MPOH5548MPOH5549MPOH5550MPOH5551MPOH5552MPOH5553MPOH5554
MPOH7020MPOH7021MPOH7022MPOH7023MPOH7024MPOH7025MPOH7026
MPOH7027MPOH7028MPOH7030MPOH7960MPOH7965MPOH7966MPOH7967
MPOH7968MPOH7969MPOH7970MPOH7971MPOH7972MPOH7973MPOH7974
MPOH7975MPOH8638MPOH8639MPOH8640MPOH8641MPOH8642MPOH8643
MPOH8644MPOH8645MPOH8646MPOH8647MPOH8648MPOH8649MPOH8650
MPOH8651MPOH8652MPOH8653MPOH8654MPOH8655MPOH8656MPOH8657
MPOH8658MPOH8659MPOH8677MPOH8678MPOH8679MPOH8680MPOH8682
MPOH8683MPOH8684MPOJ1796MPOJ1797MPOJ1798MPOJ1799MPOJ1800
Start Printed Page 77658
MPOJ1801MPOJ1803MPOJ1804MPOJ1806MPOJ1930MPOJ1931MPOJ1932
MPOJ1933MPOJ1934MPOJ1935MPOJ1936MPOJ1938MPOJ1939MPOJ1940
MPOJ1941MPOJ1942MPOJ1943MPOJ1944MPOJ1945MPOJ1946MPOJ1947
MPOJ1948MPOJ1949MPOJ1950MPOJ1951MPOJ1953MPOJ1954MPOJ1955
MPOJ1956MPOJ1957MPOJ1958MPOJ2420MPOJ2421MPOJ2422MPOJ2423
MPOJ2424MPOJ2425MPOJ2426MPOJ2427MPOJ2428MPOJ2429MPOJ2430
MPOJ2431MPOJ2432MPOJ2433MPOJ2434MPOJ2435MPOJ2436MPOJ2437
MPOJ2438MPOJ2439MPOJ2440MPOJ2441MPOJ2442MPOJ2443MPOJ2444
MPOJ2445MPOJ2446MPOJ2447MPOJ2448MPOJ2449MPOJ2450MPOJ4173
MPOJ4174MPOJ5185MPOJ5186MPOJ6035MPOJ6036MPOJ6039MPOJ6040
MPOJ6041MPOJ6042MPOJ6043MPOJ6044MPOJ6045MPOJ6046MPOJ6047
MPOJ6048MPOJ6049MPOJ6050MPOJ6051MPOJ6052MPOJ6053MPOJ6054
MPOJ6055MPOJ6056MPOJ6057MPOJ6058MPOJ6059MPOJ6060MPOJ6061
MPOJ6062MPOJ6063MPOJ6064MPOJ6065MPOJ6066MPOJ6067MPOJ6068
MPOJ6500MPOJ6501MPOJ6502MPOJ6503MPOJ6505MPOJ6506MPOJ6507
MPOJ6508MPOJ6509MPOJ6510MPOJ6511MPOJ6512MPOJ6513MPOJ6514
MPOJ6515MPOJ6516MPOJ6517MPOJ7632MPOJ7633MPOJ7634MPOJ7635
MPOJ7636MPOJ7637MPOJ7638MPOJ7639MPOJ7640MPOJ7641MPOJ7642
MPOJ7643MPOJ8046MPOJ8047MPOJ8048MPOJ8049MPOJ8050MPOJ8051
MPOJ9308MPOJ9309MPOJ9310MPOJ9311MPOJ9312MPOJ9313MPOJ9314
MPOJ9315MPOK1233MPOK1234MPOK1235MPOK1236MPOK1237MPOK1238
MPOK1239MPOK1240MPOK1824MPOK1825MPOK1826MPOK1827MPOK1828
MPOK1829MPOK1830MPOK1831MPOK1832MPOK2694MPOK2695MPOK3067
MPOK3068MPOK3069MPOK3070MPOK3071MPOK4659MPOK4660MPOK4661
MPOK4662MPOK4663MPOK4664MPOK4665MPOK4666MPOK4667MPOK5082
MPOK5083MPOK5084MPOK5085MPOK5086MPOK5087MPOK5088MPOK5520
MPOK5521MPOK5522MPOK5955MPOK5956MPOK5957MPOK5958MPOK5959
MPOK5960MPOK5961MPOK5962MPOK5963MPOK5964MPOK6247MPOK6248
MPOK6249MPOK6250MPOK6251MPOK6252MPOK6253MPOK6254MPOK6255
MPOK6256MPOK6257MPOK6715MPOK6716MPOK6823MPOK6824MPOK6825
MPOK6826MPOK6827MPOK6828MPOK6829MPOK6830MPOK6831MPOK7226
MPOK7227MPOK7228MPOK7229MPOK7230MPOK7231MPOK7232MPOK7233
MPOK7234MPOM2128MPOM2129MPOM2130MPOM2131MPOM2132MPOM2133
MPOM2134MPOM2135MPOM2136MPOM2137MPOM2138MPOM2357MPOM2358
MPOM2359MPOM2360MPOM2361MPOM2362MPOM2363MPOM2364MPOM2365
MPOM2366MPOM2461MPOM2462MPOM5521MPOM5522MPOM5523MPOM5524
MPOM5525MPOM5526MPOM5527MPOM5528MPOM5529MPOM5530MPOM5531
MPOM5532MPOM5533MPOM5534MPOM5535MPOM5536MPOM5537MPOM6151
MPOM6152MPOM6153MPOM6154MPOM6155MPOM6156MPOM6157MPOM6158
MPOM6159MPOM6160MPOM6161MPOM6162MPOM7087MPOM7088MPOM7089
MPOM7091MPOM7092MPOM7093MPOM7094MPOM7095MPOM7096MPOM7097
MPOM7098MPOM7099MPOM7100MPOM7101MPOM7102MPOM7103MPOM7104
MPOM7105MPOM7106MPOM7107MPOM7108MPOM7109MPOM8297MPOM8298
MPOM8299MPOM8300MPOM8301MPOM8302MPOM9246MPOM9257MPOM9258
MPOM9259MPOM9260MPOM9261MPOM9262MPOM9265MPOM9721MPOM9722
MPOM9723MPON0051MPON0052MPON0053MPON0055MPON0056MPON0057
MPON0058MPON0059MPON0060MPON0061MPON0062MPON0063MPON0064
MPON0065MPON0066MPON0067MPON0068MPON0069MPON0073MPON0074
MPON0075MPON0076MPON1077MPON1078MPON1079MPON1080MPON1081
MPON1082MPON1084MPON1085MPON1086MPON1087MPON1088MPON1089
MPON1090MPON1091MPON1092MPON1093MPON1094MPON1095MPON1096
MPON1097MPON1098MPON1099MPON1100MPON1642MPON4250MPON4252
MPON4254MPON4255MPON4256

Initial Inspection

(1) If the spool has not already been inspected using one of the alert service bulletins (ASB's) or service bulletins (SB's) listed in Column A of the following Table 3; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with alert service bulletin

(ASB) CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, and the following compliance times:

Table 3

CF6-45 and -50 SB No.Procedures (70-32-XX) in Standard Practices Manual GEK9250
Column AColumn BColumn CColumn DColumn E
SB 72-888, Revision 3, dated January 31, 199170-32-09, Revision 71, dated October 1, 199570-32-10, 71, Revision dated October 1, 199570-32-13, Temporary Revision (TR), 70-25, dated August 26, 199670-32-14, TR 70-26, dated August 26, 1996.
SB 72-888, Revision 4, dated March 28, 199170-32-09, Revision 72, dated November 15, 199670-32-10, Revision 72, dated November 15, 199670-32-13, Revision 72, dated November 15, 199670-32-14, Revision 72, dated November 15, 1996.
Start Printed Page 77659
SB 72-888, Revision 5, dated November 7, 199470-32-09, Revision 74, dated May 1, 199870-32-10, Revision 74, dated May 1, 199870-32-13, Revision 73, dated November 1, 199770-32-14, Revision 73, dated November 1, 1997.
SB 72-888, Revision 6, dated December 22, 199570-32-10, Revision 75, dated December 15, 199870-32-13, Revision 75, dated December 15, 199870-32-14, Revision 75, dated December 15, 1998.
SB 72-1000, Original dated December 14, 199070-32-13, TR 70-41, dated February 10, 199970-32-14, TR 70-42, dated February 10, 1999.
SB 72-1000, Revision 1, dated March 28, 199170-32-13, Revision 76, dated May 15, 199970-32-14, Revision 76, dated May 15, 1999.
SB 72-1000, Revision 2, dated September 9, 199370-32-17, TR 70-39, dated December 15, 199870-32-18, TR 70-40, dated December 15, 1998.
SB 72-1000, Revision 3, dated December 22, 199570-32-17, Revision 76, dated May 15, 199970-32-18, Revision 76, dated May 15, 1999.
SB 72-1108, Original, dated November 6, 199570-32-17, TR 70-47, dated October 28, 199970-32-18, TR 70-48, dated October 28, 1999.
SB 72-1108, Revision 1, dated July 29, 1996
ASB 72-A1108, Revision 2, dated October 28, 1999
ASB 72-A1108, Revision 3, dated November 12, 1999
ASB 72-A1108, Revision 4, dated June 6, 2001
ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002

(i) For spools with greater than 3,500 cycles-since-new (CSN) on the effective date of this AD, inspect before further flight.

(ii) For spools with 3,500 or fewer CSN, on the effective date of this AD, inspect at the first piece-part exposure (PPE) after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.

(2) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the first PPE after 1,000 CSN, but before 4,000 additional cycles in-service (CIS) after the effective date of this AD.

(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1000 CSN, or

(ii) The first HPC rotor exposure after 1000 CSN, or

(iii) The next required inspection to ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002.

Repetitive Inspection

(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 cycles-since-last-inspection (CSLI) and 3,500 CSN, or

(ii) From July 29, 2001 through January 27, 2003, before the cycle limits of the following Table 4:

Table 4

CSN at last inspectionRepeat inspection by
(A) 6,000 or fewer CSN3,500 CSLI.
(B) 6,001 to 7,000 CSN9,500 CSN.
(C) 7,001 to 8,000 CSN2,500 CSLI.
(D) 8,001 to 8,500 CSN10,500 CSN.
(E) 8,501 or more CSN2,000 CSLI.

(iii) After January 27, 2003, before the cycle limits of the following Table 5:

Table 5.

CSN at last inspectionRepeat inspection by
(A) 5,000 or fewer CSN3,500 CSLI.
(B) 5,001 to 5,500 CSN8,500 CSN.
(C) 5,501 to 6,500 CSN3,000 CSLI.
(D) 6,501 to 7,000 CSN9,500 CSN.
(E) 7,001 to 8,000 CSN2,500 CSLI.
(F) 8,001 to 8,500 CSN10,500 CSN.
(G) 8,501 or more CSN2,000 CSLI.

Spool Disposition

(5) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, replace spool before further flight.

CF6-45 and -50 13-inch Billet Spools

(b) For CF6 HPC Rotor Stage 3-9 Spool, P/N's 9136M89G03, 9136M89G07, 9136M89G09, 9136M89G17, 9136M89G18, 9253M85G01, and for P/N's 9136M89G08, 9253M85G01, 9273M14G01, and 9331M29G01 with serial numbers that are not listed in Table 2, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not Start Printed Page 77660already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002 before further flight.

(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first engine shop visit (ESV) after 4,000 CSN, or

(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 4,000 CSN.

(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

(4) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

Repetitive Inspection

(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 4,000 CSN, or

(ii) Each ESV with more than 2,000 CSLI and 4,000 CSN, or

(iii) Before 4,000 CSLI.

Spool Disposition

(6) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, replace spool before further flight.

CF6-45 and -50 9 and 10-Inch Billet Spools

(c) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G19, 9136M89G21, 9136M89G22 and 9136M89G27, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect the hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002 before further flight.

(2) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect the hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 3,000 CSN, or

(iii) From July 29, 2001 through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.

(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB CF6-50 S/B 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

(4) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

Repetitive Inspection

(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or

(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of the following Table 6, or:

Table 6

CSN at last inspectionReinspect by
(A) 3,500 or fewer CSN7,000 CSN.
(B) 3,501 to 6,000 CSN3,500 CSLI.
(C) 6,001 to 7,000 CSN9,500 CSN.
(D) 7,001 to 8,000 CSN2,500 CSLI.
(E) 8,001 to 8,500 CSN10,500 CSN.
(F) 8,501 or more CSN2,000 CSLI.

(iii) After January 27, 2003, before the cycle limits of Table 5.

Spool Disposition

(6) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 9136M89G19, 9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool has 10,500 or more CSN.

CF6-45 and -50 8-Inch Billet 2-Piece spools

(d) For CF6 HPCR stage 3-9 spool, P/N 9136M89G29, do the following:

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(2) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

Spool Disposition

(4) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated Start Printed Page 77661October 2, 2002; replace spool before further flight.

CF6-80A 16-Inch Billet Spools

(e) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G10 with SN's MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, MPOM9264, MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or MPON4253, do the following:

Initial Inspection

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, and the following compliance times:

Table 7

CF6-80A SB No.Procedures (70-32-XX) in standard practices manual GEK9250
Column AColumn BColumn CColumn DColumn E
SB 72-500, Revision 3, dated March 19, 199170-32-09, Revision 71, dated October 1, 199570-32-10, Revision 71, dated October 1, 199570-32-13, Temporary Revision (TR), 70-25, dated August 26, 199670-32-14, TR 70-26, dated August 26, 1996.
SB 72-500, Revision 4, dated July 1, 199170-32-09, Revision 72, dated November 15, 199670-32-10, Revision 72, dated November 15, 199670-32-13, Revision 72, dated November 15, 199670-32-14, Revision 72, dated November 15, 1996.
SB 72-500, Revision 5, dated November 7, 199470-32-09, Revision 74, dated May 1, 199870-32-10, Revision 74, dated May 1, 199870-32-13, Revision 73, dated November 1, 199770-32-14, Revision 73, dated November 1, 1997.
SB 72-500, Revision 6, dated December 22, 199570-32-10, Revision 75, dated December 15, 199870-32-13, Revision 75, dated December 15, 199870-32-14, Revision 75, dated December 15, 1998.
SB 72-583, Original, dated December 20, 199070-32-13, TR 70-41, dated February 10, 199970-32-14, TR 70-42, dated February 10, 1999.
SB 72-583, Revision 1, dated March 18, 199170-32-13, Revision 76, dated May 15, 199970-32-14, Revision 76, dated May 15, 1999.
SB 72-583, Revision 2, dated July 15, 199170-32-17, TR 70-39, dated December 15, 199870-32-18, TR 70-40, dated December 15, 1998.
SB 72-583, Revision 3, dated July 24, 199170-32-17, Revision 76, dated May 15, 199970-32-18, Revision 76, dated May 15, 1999.
SB 72-583, Revision 4, dated September 15, 199370-32-17, TR 70-47, dated October 28, 199970-32-18, TR 70-48, dated October 28, 1999.
SB 72-583, Revision 5, dated December 22, 1995
SB 72-678, Original, dated November 6, 1995
SB 72-678, Revision 1, dated July 29, 1996
ASB 72-A678, Revision 2, dated October 28, 1999
ASB 72-A678, Revision 3, dated November 12, 1999
ASB 72-A0678, Revision 4, dated June 6, 2001
ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002

(i) For spools with greater than 3,500 CSN on the effective date of this AD, inspect before further flight.

(ii) For spools with 3,500 or fewer CSN on the effective date of this AD, inspect at the first PPE after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.

(2) For spools that have not been inspected using ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS accumulated after the effective date of this AD.

(3) For spools that have not been inspected using ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719, inspect the stage 3—5 dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first HPCR exposure after 1,000 CSN, or

(iii) The next required inspection to ASB

CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.

Repetitive Inspections

(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; and the dovetail slot bottoms in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or Start Printed Page 77662

(ii) From July 29, 2001 through January 27, 2003 before the cycle limits of Table 4, or

(iii) After January 27, 2003, before the cycle limits of Table 5.

Spool Disposition

(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool P/N 9136M89G10 with serial numbers (SN's) MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, MPOM9264, MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or MPON4253, installed where the spool has 10,500 or more CSN.

CF6-80A 13-Inch Billet Spools

(f) For all other CF6 HPCR stage 3-9 spools,

P/N 9136M89G10, with SN's that are not listed in paragraph (e) of this AD, and P/N 9136M89G11, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80A 72-A0678, Revision 5, dated October 2, 2002 before further flight.

(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 5,000 CSN or

(iii) From July 29, 2001, through January 27, 2003 before 7,000 CSN, and after January 27, 2003, before 5,000 CSN.

(3) For spools that have not been inspected using ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

(4) For spools that have not been inspected using ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719, inspect the dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

Repetitive Inspection

(5) For spools installed in CF6-80A1 and CF6-80A3 engines that were inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect hub and bore in accordance with alert ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or

(ii) Each ESV with more than 2,000 CSLI and 5,000 CSN, or

(iii) Within 4,000 CSLI and more than 5,000 CSN.

(6) Spools installed in CF6-80A and CF6-80A2 engines previously inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or

(ii) Each ESV with more than 1,500 CSLI and 5,000 CSN, or

(iii) Within 4,000 CSLI and more than 5,000 CSN.

Spool Disposition

(7) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.

CF6-80A 9 and 10-Inch Billet Spools

(g) For CF6 HPCR stage 3-9 spools, P/N's 9136M89G20, 9136M89G21, 9136M89G22 and 9136M89G27, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002 before further flight.

(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 3,000 CSN or

(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 5,000 CSN.

(3) For spools that have not been inspected using ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

(4) For spools that have not been inspected using ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719 inspect the dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

Repetitive Inspection

(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or

(ii) From July 29, 2001 through January 27, 2003, before the cycle limits of Table 6.

(iii) After January 27, 2003, before the cycle limits of the following Table 8:

Table 8

CSN at last inspectionRepeat inspection by
(A) 1,500 or fewer CSN5,000 CSN
(B) 1,501 to 5,000 CSN3,500 CSLI
(C) 5,001 to 5,500 CSN8,500 CSN
(D) 5,501 to 6,501 CSN3,000 CSLI
(E) 6,501 to 7,000 CSN9,500 CSN
(F) 7,001 to 8,000 CSN2,500 CSLI
(G) 8,001 to 8,500 CSN10,500 CSN
(H) 8,501 or more CSN2,000 CSLI

Spool Disposition

(6) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight. Start Printed Page 77663

Spool Reinstallation Limit

(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 9136M89G20, 9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool has 10,500 or more CSN.

CF6-80A 8-Inch Billet 2-Piece Spools

(h) For CF6 HPCR stage 3-9 spool, P/N 9136M89G28, do the following:

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(2) For spools that have not been inspected using ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(3) For spools that have not been inspected using ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719 inspect the stage 3—5 dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

Spool Disposition

(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.

CF6-80C2 13-Inch Billet Spools

(i) For CF6 HPCR stage 3-9 spool, P/N's 1781M52P01, 1854M95P02,1781M52P02, 1854M95P05 and 9380M28P05, do the following:

Initial Inspection

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, and the following compliance times:

Table 9

CF6-80C2 SB No.Procedures (70-32-XX) in standard practices manual GEK9250
Column AColumn BColumn CColumn DColumn E
SB 72-418, Revision 2, May 14, 199170-32-09, Revision 71, dated October 1, 199570-32-10, Revision 71, dated October 1, 199570-32-13, Temporary Revision (TR), 70-25, dated August 26, 199670-32-14, TR 70-26, dated August 26, 1996.
SB 72-418, Revision 3, November 7, 199470-32-09, Revision 72, dated November 15, 199670-32-10, Revision 72, dated November 15, 199670-32-13, Revision 72, dated November 15, 199670-32-14, Revision 72, dated November 15, 1996.
SB 72-418, Revision 4, December 22, 199570-32-09, Revision 74, dated May 1, 199870-32-10, Revision 74, dated May 1, 199870-32-13, Revision 73, dated November 1, 199770-32-14, Revision 73, dated November 1, 1997.
SB 72-758, Original, dated November 7, 199470-32-10, Revision 75, dated December 15, 199870-32-13, Revision 75, dated December 15, 199870-32-14, Revision 75, dated December 15, 1998.
SB 72-758, Revision 1, dated December 22, 199570-32-13, TR 70-41, dated February 10, 199970-32-14, TR 70-42, dated February 10, 1999.
SB 72-812, Original, dated November 6, 199570-32-13, Revision 76, dated May 15, 199970-32-14, Revision 76, dated May 15, 1999.
SB 72-812, Revision 1, dated january 30, 199870-32-17, TR70-39, dated December 15, 199870-322-18, TR 70-40, dated December 15, 1998.
ASB 72-A0812, Revision 2, dated October 28, 199970-32-17, Revision 76, dated May 15, 199970-32-18, Revision 76, dated May 15, 1999.
ASB 72-A0812, Revision 3, dated June 6, 200170-32-17, TR 70-47, dated October 28, 199970-32-18, TR 70-48, October 28, 1999.
ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.

(i) For spools with greater than 3,500 CSN on the effective date of this AD, inspect before further flight.

(ii) For spools with 3,500 or fewer CSN on the effective date of this AD, inspect at the first PPE after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.

(2) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB 72-0848, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1000 CSN, or

(ii) The next required inspection to ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or

(iii) From July 29, 2001 through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.

(3) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first HPCR exposure after 1,000 CSN, or

(iii) The next required inspection to ASB

CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.

Repetitive Inspection

(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a Start Printed Page 77664combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with ASB 72-A812, Revision 4, dated October 2, 2002; the web and hub-to-web transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002; and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earliest of:

(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or

(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 4.

(iii) After January 27, 2003, before the cycle limits of Table 5.

Spool Disposition

(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1781M52P01, 1781M52P02, 1854M95P02, 1854M95P05, and 9380M28P05, installed where the spool has 10,500 or more CSN.

CF6-80C2 9 and 10-Inch Billet Spools

(j) For CF6 HPCR stage 3-9 spool, P/Ns 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01,1781M53G02, 1781M53G03, 1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06, and 1854M95P07, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, or if the spool has not been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB 72-0848, inspect the hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002; and the web and hub-to-web transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, before further flight.

(2) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect the hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 3,000 CSN, or

(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.

(3) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB CF6-80C2 72-0848, inspect the web and the web and hub-to-web transition areas in accordance with CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 3,000 CSN, or

(iii) From July 29, 2001, through July 28, 2003, before 7,000 CSN and after July 28, 2003, before 3,500 CSN.

(4) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) Within 4,000 additional CIS after the effective date of this AD.

Repetitive Inspection

(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, and the web and hub-to-web transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earlier of:

(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or

(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 6, and after January 27, 2003, before the cycle limits of Table 5.

Spool Disposition

(6) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72\A0934, Revision 4, dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01, 1781M53G02, 1781M53G03, 1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06 and 1854M95P07, installed where the spool has 10,500 or more CSN.

CF6-80C2 8-Inch Billet 2-Piece Spools

(k) For CF6 HPCR stage 3-9 spool, P/N's 1333M66G10, 1781M53G05, 1781M53G010, and 1854M95P08, do the following:

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB 72-A0812, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(2) For spools that have not been inspected using ASB 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848, or SB 72-0848, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(3) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 3, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

Spool Disposition

(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002; replace spool before further flight.

CF6-80E1 9&10-Inch Billet Spools

(l) For CF6 HPCR stage 3-9 spool, P/N's 1669M22G01, 1669M22G03, 1782M22G01 and 1782M22G02, do the following:

Initial Inspection

(1) If the spool has greater than 7,000 CSN and has not already been inspected using one of the ASB's listed in Column A of the following Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, OR if the spool has not been inspected using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; and the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, before further flight. Start Printed Page 77665

Table 10

CF6-80E1 SB No. Column AProcedures (70-32-XX) in standard practices manual GEK9250
Column BColumn CColumn DColumn E
ASB 72-A0135, dated August 13, 199870-32-09, Revision 71, dated October 1, 199570-32-10, Revision 71, dated October 1, 199570-32-13, Temporary Revision (TR), 70-25, dated August 26, 199670-32-14, TR 70-26, dated August 26, 1996.
ASB 72-A0135, Revision 1, dated October 28, 199970-32-09, Revision 71, dated November 15, 199670-32-10, Revision 71, dated November 15, 199670-32-13, Revision 72, dated November 15, 199670-32-14, Revision 71, dated November 15, 1996.
ASB 72-A0135, Revision 2, dated June 6, 200170-32-09, Revision 74, dated May 1, 199870-32-10, Revision 74, dated May 1, 199870-32-13, Revision 73, dated November 1, 199770-32-14, Revision 73, dated November 1, 1997.
ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 200270-32-10, Revision 75, dated December 15, 199870-32-13, Revision 75, dated December 15, 199870-32-14, Revision 75, dated December 15, 1998.
70-32-13, TR 70-41, dated February 10, 199970-41, TR 70-42, dated February 10, 1999.
70-31-13, Revision 76, dated May 15, 199970-31-14, Revision 76, dated May 15, 1999.
70-31-17, TR 70-39, dated December 15, 199870-31-18, TR 70-40, dated December 15, 1998.
70-31-17, Revision 76, dated May 15, 199970-31-18, Revision 76, dated May 15, 1999.
70-31-17 TR 70-47, dated October 28, 199970-31-18 TR 70-48, dated October 28, 1999.

(2) If the spool has 7,000 or fewer CSN and has not already been inspected using one of the ASB's listed in Column A of Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, OR if the spool has not been inspected using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; and the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 3,000 CSN, or

(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.

(3) Spools not previously inspected using ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-0137, or SB 72-0137, inspect stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earliest of:

(i) The first PPE after 1,000 CSN, or

(ii) The first HPCR exposure after 1,000 CSN, or

(iii) The next required inspection to ASB

CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002.

Repetitive Inspection

(4) For spools that have already been inspected using one of the ASB's listed in Column A of Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect the hub and bore in accordance with the requirements of ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002, the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earlier of:

(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or

(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 6, and after January 27, 2003, before the cycle limits of Table 5.

Spool Disposition

(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1669M22G01, 1669M22G03, 1782M22G01, and 1782M22G02, installed where the spool has 10,500 or more CSN.

CF6-80E1 8-Inch Billet 2-Piece Spools

(m) For CF6 HPCR stage 3-9 spool, P/N 1782M22G04, do the following:

(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(2) For spools that have not been inspected using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

(3) For spools that have not been inspected using ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0137, or SB 72-0137, inspect the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earlier of:

(i) The first PPE after 1,000 CSN, or

(ii) The first ESV after 6,000 CSN.

Spool Disposition

(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002; replace spool before further flight.

Reporting Requirements

(n) Within five calendar days of inspection, report the results of inspections that equal or exceed the reject criteria to: Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive park, Burlington, MA 01803-5299; telephone (781) 238-7147; fax (781) 238-7199. Reporting requirements have been approved by the Office of Management and Start Printed Page 77666Budget and assigned OMB control number 2120-0056. Be sure to include the following information:

(1) Part Number.

(2) Serial Number.

(3) Spool CSN.

(4) Spool CSLI.

(5) Date and location where inspection was done.

Definitions

(o) For the purpose of this AD, the following definitions apply:

(1) A module level exposure is a separation of the fan module from the engine.

(2) An HPC rotor exposure is a HPC top or bottom case removal.

(3) A PPE is a disassembly and removal of the stage 3-9 spool from the HPCR structure, regardless of any blades, locking lugs, bolts or balance weights assembled to the spool.

(4) An ESV is the introduction of an engine into the shop where the separation of a major engine flange will occur after the effective date of this AD.

(5) The following maintenance actions, or any combination, are not considered ESV's for requiring repeat inspections:

(i) Introduction of an engine into a shop solely for removal of the compressor top or bottom case for airfoil maintenance or variable stator vane bushing replacement.

(ii) Introduction of an engine into a shop solely for removal or replacement of the Stage 1 Fan Disk.

(iii) Introduction of an engine into a shop solely for replacement of the Turbine Rear Frame.

(iv) Introduction of an engine into a shop solely for replacement of the Accessory and/or Transfer Gearboxes.

(v) Introduction of an engine into a shop solely for replacement of the Fan Forward Case.

Alternative Methods of Compliance

(p) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office (ECO). Operators must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO.

Note 2:

Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO.

Special Flight Permits

(q) Special flight permits may be issued in accordance with §§ 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be done.

Documents That Have Been Incorporated By Reference

(r) The inspections must be done in accordance with the following GE Aircraft Engines alert service bulletins (ASB's):

Document No.PagesRevisionDate
ASB CF6-50 S/B 72-A1108All5October 2, 2002.
  Total pages: 7.
ASB CF6-50 S/B 72-A1131All4  Do.
  Total pages: 43.
ASB CF6-50 S/B 72-A1157All4  Do.
  Total pages: 38.
ASB CF6-80A S/B 72-A0678All5  Do.
  Total pages: 7.
ASB CF6-80A S/B 72-A0691All5  Do.
  Total pages: 43.
ASB CF6-80A S/B 72-A0719All5  Do.
  Total pages: 38.
ASB CF6-80C2 S/B 72-A0812All4  Do.
  Total pages: 6.
ASB CF6-80C2 S/B 72-A0848All8  Do.
  Total pages: 43.
ASB CF6-80C2 S/B 72-A0934All4  Do.
  Total pages: 38.
ASB CF6-80E1 S/B 72-A0126All5  Do.
  Total pages: 44.
ASB CF6-80E1 S/B 72-A0135All3  Do.
  Total pages: 6.
ASB CF6-80E1 S/B 72-A0137All4  Do.
  Total pages: 38.

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from General Electric Company via Lockheed Martin Technology Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215, telephone (513) 672-8400, fax (513) 672-8422. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the

Effective Date

(s) This amendment becomes effective on January 23, 2003.

Start Signature

Issued in Burlington, Massachusetts, on December 11, 2002.

Francis A. Favara,

Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service.

End Signature End Supplemental Information

[FR Doc. 02-31754 Filed 12-18-02; 8:45 am]

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