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Rule

Airworthiness Directives; Boeing Model 767 Series Airplanes

Action

Final Rule.

Summary

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 767 series airplanes, that requires an inspection to detect cracks and fractures of the outboard hinge fitting assemblies on the trailing edge of the inboard main flap, and follow-on and corrective actions if necessary. For certain airplanes, this amendment also requires a one-time inspection to determine if a tool runout procedure has been performed in the area. The actions specified by this AD are intended to prevent the inboard aft flap from separating from the wing and potentially striking the airplane, which could result in damage to the surrounding structure and potential personal injury. This action is intended to address the identified unsafe condition.

Unified Agenda

Airworthiness Directives

1 action from November 2013

  • November 2013
    • Actions Will Continue Through
 

Table of Contents Back to Top

Tables Back to Top

DATES: Back to Top

Effective July 29, 2003.

The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of July 29, 2003.

ADDRESSES: Back to Top

The service information referenced in this AD may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. This information may be examined at the Federal Aviation Administration (FAA), Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Back to Top

Suzanne Masterson, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 917-6441; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION: Back to Top

A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain Boeing Model 767 series airplanes was published in the Federal Register on January 6, 2003 (68 FR 518). That action proposed to require an inspection to detect cracks and fractures of the outboard hinge fitting assemblies on the trailing edge of the inboard main flap, and follow-on and corrective actions if necessary. For certain airplanes, that action also proposed to require a one-time inspection to determine if a tool runout procedure has been performed in the area.

Comments Back to Top

Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the comments received. One commenter concurs with the contents of the proposed AD.

Request To Change Applicability Back to Top

One commenter, the manufacturer, asks that the applicability specified in the proposed AD be changed. The commenter states that line number 870 is for a Model 767-300 airplane, and is outside the line number effectivity listed in Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001 (which was referenced in the proposed AD and specified line numbers 1 through 825 inclusive).

The FAA agrees with the commenter. Line number 870 is for a Model 767-300ER airplane, and was inadvertently added to the applicability specified in the proposed AD. The applicability in this final rule has been changed accordingly.

Request To Extend Compliance Time Back to Top

One commenter states that a compliance time grace period of 90 days for the inspections specified in paragraph (a)(1) of the proposed AD would be extremely difficult. The commenter asks that the grace period be extended to 270 days. The commenter adds that this will allow sufficient time for affected operators to schedule and accomplish the inspections, and will provide time for Boeing to produce adequate spares.

We do not agree with the commenter, as insufficient supporting data were provided to us to substantiate the request. Boeing Service Bulletin 767-57A0076, Revision 1, was issued on March 29, 2001, and recommended a grace period of 90 days after release of the service bulletin. In addition, Boeing parts are not necessary unless discrepant parts are found during the inspections. The terminating action provided by paragraph (f) of this final rule would require installing the new parts, but is not mandatory. Therefore, no extension is necessary in order to obtain parts.

In developing an appropriate compliance time for this action, we considered not only the degree of urgency associated with addressing the subject unsafe condition, but the manufacturer's recommendation as to an appropriate compliance time, and the practical aspect of accomplishing the required inspections within an interval of time that parallels normal scheduled maintenance for the majority of affected operators. However, under the provisions of paragraph (i) of the final rule, we may approve requests for adjustments to the compliance time if data are submitted to substantiate that such an adjustment would provide an acceptable level of safety.

Parts Availability Back to Top

One commenter states a concern for the availability of improved fittings for replacement. The commenter notes that, due to warranty, it anticipates replacing any fittings that do not exhibit the tool runout option, regardless of the inspection results.

We have been assured by the parts manufacturer that a sufficient number of replacement parts is available. However, this may not cover all parts without the tool runout option, regardless of the condition of the parts. If the commenter expects to replace a large number of parts, ordering the parts in advance so the manufacturer has time to produce adequate replacement parts is recommended.

Request To Provide a Method To Identify Certain Fittings Back to Top

One commenter states that the proposed AD specifies that certain part numbers may not be installed on any aircraft unless the requirements of the proposed AD have been accomplished. The commenter notes that neither the proposed AD nor the referenced service bulletins provide instructions on how to identify fittings that have met the requirements of the proposed AD.

Although the commenter does not make a specific request, we infer that the commenter wants the FAA to provide instructions in the final rule for identification of the fittings that meet the AD requirements. We do not agree that such additional instructions are necessary because it is the operator's responsibility to show documented compliance to the requirements of the AD. If a spare part is installed on an airplane, and the previous inspection history of the part is not documented, the applicable inspection must be done and must be repeated at the intervals required by this AD. Paragraph (h) of the proposed AD identifies the part numbers for fittings that cannot be installed unless the applicable requirements of the AD have been accomplished for that fitting. Those requirements are specified in paragraphs (a) through (f) of the AD. No change is made to the final rule in this regard.

Request To Change Cost Impact Section Back to Top

One commenter estimates that the detailed visual and eddy current inspections specified in the proposed AD take 15 work hours per airplane to do, at a cost of $117,000 for the operator's fleet.

Although the commenter does not make a specific request, we infer that the commenter wants the work hours and cost for the detailed visual and eddy current inspections specified in the Cost Impact section to be changed. We do not agree to change the number of estimated work hours for the inspections. The number of work hours necessary to accomplish the inspections, specified as 5 in the cost impact information, is consistent with the service bulletin. This number represents the time necessary to perform only the inspections actually required by this AD. Therefore, no change is made to the final rule in this regard.

Request To Clarify Applicability Back to Top

One commenter would like to obtain clarification of the applicability specified in the proposed AD relative to airplanes in the Model 767-400 fleet having fuselage numbers 875 (variable number VQ085) and 877 (variable number VQ086), which are not listed in the applicability section. The commenter states that, according to the effectivity in the original issue of Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002, only an airplane having fuselage number 877 is not affected by the proposed AD.

The terminology “fuselage numbers” actually refers to airplane line numbers, rather than the terminology used by the commenter for tracking its airplanes. Boeing Airplane Information Report dated October 2, 2002, shows Model 767 line number 875 as having variable number VS701, line number 876 having variable number VQ085, line number 877 having variable number VS721, and line number 878 having variable number VQ086; these figures do not match the variable numbers provided by the commenter. Regardless, the line numbers specified in the proposed AD and the referenced service bulletin are correct. No change is made to the final rule in this regard.

Request To Clarify Certain Wording in Paragraph (c) Back to Top

One commenter asks that the last sentence in paragraph (c) of the proposed AD be changed for clarification from “This AD requires that the terminating action, if required, be accomplished before further flight” to “This AD requires that the terminating action, if required because cracks have been found, be accomplished before further flight.” The commenter states that it is not explicit in paragraph (c) that the terminating action is required only if cracks are found. The commenter adds that specifying the need to accomplish terminating action before further flight, without explicitly referencing cracks, may confuse the operator.

We do not agree with the commenter. Paragraph (c) of the proposed AD merely clarifies that, if the referenced service bulletins specify corrective action (i.e., if cracked or fractured fittings are found, do Part 3—Terminating Action), such action is required before further flight. No change is made to the final rule in this regard.

Conclusion Back to Top

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 change previously described. The FAA has determined that this change will neither increase the economic burden on any operator nor increase the scope of the AD.

Cost Impact Back to Top

There are approximately 783 airplanes of the affected design in the worldwide fleet. The FAA estimates that 354 airplanes of U.S. registry will be affected by this AD.

It will take approximately 2 work hours per airplane to accomplish the detailed inspection, at an average labor rate of $60 per work hour. Based on these figures, the cost impact of this action is estimated to be $42,480, or $120 per airplane, per inspection cycle.

It will take approximately 5 work hours per airplane to accomplish the detailed visual and eddy current inspections, at an average labor rate of $60 per work hour. Based on these figures, the cost impact of these actions is estimated to be $106,200, or $300 per airplane, per inspection cycle.

The cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. The cost impact figures discussed in AD rulemaking actions represent only the time necessary to perform the specific actions actually required by the AD. These figures typically do not include incidental costs, such as the time required to gain access and close up, planning time, or time necessitated by other administrative actions.

The terminating action, if accomplished, will take approximately 24 work hours per airplane, at an average labor rate of $60 per work hour. Based on these figures, the cost impact of this action is estimated to be $1,440 per airplane.

Regulatory Impact Back to Top

The regulations adopted herein will 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. Therefore, it is determined that this final rule does not have federalism implications under Executive Order 13132.

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 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 from the Rules Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39 Back to Top

Adoption of the Amendment Back to Top

begin regulatory text

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39—AIRWORTHINESS DIRECTIVES Back to Top

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

Authority:

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

§ 39.13 [Amended]

2.Section 39.13 is amended by adding the following new airworthiness directive:

2003-13-01Boeing: Amendment 39-13201. Docket 2002-NM-143-AD.

Applicability: Model 767 series airplanes, certificated in any category; line numbers 1 through 826 inclusive, 830, 842, 855, 856, 859, 862, 864 through 866 inclusive, 868, 869, 871 through 874 inclusive, and 876.

Note 1:

This AD applies to each airplane 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 airplanes 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 (i) 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: Required as indicated, unless accomplished previously.

To prevent the inboard aft flap from separating from the wing and potentially striking the airplane, which could result in damage to the surrounding structure and potential personal injury, accomplish the following:

Inspection Back to Top

(a) Perform either a detailed inspection, or a detailed inspection plus an eddy current inspection, of the outboard hinge fitting assemblies on the trailing edge of the inboard main flap to detect cracks and fractures and evidence of a tool runout procedure, as applicable.

(1) For Model 767-200, -300, and -300F series airplanes: Inspect before the airplane accumulates 2,700 total flight cycles, or within 90 days after the effective date of this AD, whichever occurs later, in accordance with Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001.

(2) For Model 767-400ER series airplanes: Inspect before the airplane accumulates 12,000 total flight cycles, in accordance with Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002.

Note 2:

For the purposes of this AD, a detailed inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”

Follow-On/Corrective Actions Back to Top

(b) Following the initial inspection(s) required by paragraph (a) of this AD: Perform applicable follow-on and corrective actions at the time(s) specified in Figure 1 of Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001 (for Model 767-200, -300, and -300F series airplanes); or Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002 (for Model 767-400ER series airplanes). Do the follow-on and corrective actions (including repetitive inspections and replacement of the fittings with new fittings) in accordance with Part 1 or Part 2 of the service bulletin, as applicable, except as required by paragraph (d) of this AD. For Model 767-200, -300, and -300F series airplanes: If the fitting has the tool runout, and no cracking or fracture is found during the inspection, this AD requires no further action for that hinge fitting.

Exceptions to Service Bulletin Procedures Back to Top

(c) Where the terminating action in Part 3 of the service bulletin is specified as corrective action in Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001; and Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002: This AD requires that the terminating action, if required, be accomplished before further flight.

(d) Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001, specifies to contact Boeing before the terminating action is done as corrective action for any cracking or fracture found on a Model 767-200, -300, or -300F series airplane with the tool runout. This AD requires that any such crack or fracture on those airplanes be reported to the FAA in accordance with paragraph (e) of this AD and repaired in accordance with Part 3 of the service bulletin.

Reporting Requirement Back to Top

(e) For any Model 767-200, -300, or -300F series airplane with the tool runout, on which any cracking or fracture is found during the inspection(s) required by paragraph (a) of this AD: Submit a report of the inspection findings to the Manager, Seattle Aircraft Certification Office (ACO), FAA, at the applicable time specified in paragraph (e)(1) or (e)(2) of this AD. The report must include the inspection results, a description of any discrepancies found, the airplane serial number, and the number of landings and flight hours on the airplane. Information collection requirements contained in this AD have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056.

(1) For airplanes on which the initial inspection is done after the effective date of this AD: Submit the report within 30 days after performing the inspection required by paragraph (a) of this AD.

(2) For airplanes on which the initial inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.

Terminating Action Back to Top

(f) Unless required to do so by paragraph (b) of this AD: Operators may choose to accomplish the terminating action (including replacement of the fittings with new fittings, and reinstallation of existing upper skin access panels and fairing midsections on the trailing edge of the main flap) in accordance with Part 3 of the Work Instructions of Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001; or Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002; as applicable. Accomplishment of the terminating action terminates the repetitive inspection requirements of paragraph (b) of this AD.

Credit for Prior Accomplishment Per Earlier Service Information Back to Top

(g) Accomplishment before the effective date of this AD of an inspection, associated follow-on and corrective actions, and terminating action in accordance with Boeing Alert Service Bulletin 767-57A0076, dated October 26, 2000, is acceptable for compliance with the corresponding requirements of this AD for applicable airplanes.

Part Installation Back to Top

(h) As of the effective date of this AD, no person may install on any airplane a hinge fitting assembly that has any part number listed in Table 1 of this AD, unless the applicable requirements of this AD have been accomplished for that fitting. Table 1 follows:

Table 1.—Hinge Fitting Assembly Part Numbers Back to Top
113T2271-13 113T2271-14
113T2271-23 113T2271-24
113T2271-29 113T2271-30
113T2271-33 113T2271-34
113T2271-401 113T2271-402

Alternative Methods of Compliance Back to Top

(i) 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, Seattle ACO. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO.

Note 3:

Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO.

Special Flight Permits Back to Top

(j) 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 accomplished.

Incorporation by Reference Back to Top

(k) Unless otherwise specified in this AD, the actions shall be done in accordance with Boeing Service Bulletin 767-57A0076, Revision 1, dated March 29, 2001; and Boeing Alert Service Bulletin 767-57A0079, dated June 20, 2002; as applicable. 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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

Effective Date Back to Top

(l) This amendment becomes effective on July 29, 2003.

end regulatory text

Issued in Renton, Washington, on June 16, 2003.

Kalene C. Yanamura,

Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.

[FR Doc. 03-15594 Filed 6-23-03; 8:45 am]

BILLING CODE 4910-13-P

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