Federal Aviation Administration, DOT.
Notice of proposed rulemaking (NPRM).
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Dornier Model 328-100 and -300 series airplanes. This proposal would require a one-time inspection for fracture and/or breakage of the hinge bolt of the output rod of the rudder spring tab lever assembly, and corrective action if necessary. This proposal also would require modification of the hinge bolt. This action is necessary to prevent fracture and/or breakage of the hinge bolt, which could result in migration of the bolt tail, a loose spring tab, and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
Comments must be received by April 5, 2004.
Submit comments in triplicate to the Federal Aviation Administration (FAA), Transport Airplane Directorate, ANM-114, Attention: Rules Docket No. 2003-NM-120-AD, 1601 Lind Avenue, SW., Renton, Washington 98055-4056. Comments may be inspected at this location between 9 a.m. and 3 p.m., Monday through Friday, except Federal holidays. Comments may be submitted via fax to (425) 227-1232. Comments may also be sent via the Internet using the following address: firstname.lastname@example.org. Comments sent via fax or the Internet must contain “Docket No. 2003-NM-120-AD” in the subject line and need not be submitted in triplicate. Comments sent via the Internet as attached electronic files must be formatted in Microsoft Word 97 or 2000 or ASCII text. Start Printed Page 10380
The service information referenced in the proposed rule may be obtained from AvCraft Aerospace GmbH, P.O. Box 1103, D-82230 Wessling, Germany. This information may be examined at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington.Start Further Info
FOR FURTHER INFORMATION CONTACT:
Dan Rodina, Aerospace Engineer, International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 227-2125; fax (425) 227-1149.End Further Info End Preamble Start Supplemental Information
Interested persons are invited to participate in the making of the proposed rule by submitting such written data, views, or arguments as they may desire. Communications shall identify the Rules Docket number and be submitted in triplicate to the address specified above. All communications received on or before the closing date for comments, specified above, will be considered before taking action on the proposed rule. The proposals contained in this action may be changed in light of the comments received.
Submit comments using the following format:
- Organize comments issue-by-issue. For example, discuss a request to change the compliance time and a request to change the service bulletin reference as two separate issues.
- For each issue, state what specific change to the proposed AD is being requested.
- Include justification (e.g., reasons or data) for each request.
Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the proposed rule. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. A report summarizing each FAA-public contact concerned with the substance of this proposal will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this action must submit a self-addressed, stamped postcard on which the following statement is made: “Comments to Docket Number 2003-NM-120-AD.” The postcard will be date stamped and returned to the commenter.
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules Docket No. 2003-NM-120-AD, 1601 Lind Avenue, SW., Renton, Washington 98055-4056.
The Luftfahrt-Bundesamt (LBA), which is the airworthiness authority for Germany, notified the FAA that an unsafe condition may exist on all Dornier Model 328-100 and -300 series airplanes. The LBA advises that certain data indicate the possibility of fracture and/or breakage of the hinge bolt tail of the output rod of the rudder spring tab lever assembly, which could result in migration of the bolt tail. This condition, if not corrected, could result in a loose spring tab and consequent reduced controllability of the airplane.
Explanation of Relevant Service Information
Dornier has issued Service Bulletins SB-328-27-423 (for Model 328-100 series airplanes), and SB-328J-27-159 (for Model 328-300 series airplanes), both dated February 4, 2002. The service bulletins describe procedures for a one-time inspection for fracture and/or breakage of the hinge bolt of the output rod of the rudder spring tab lever assembly. The service bulletins also describe procedures for modification of the hinge bolt. The modification includes installing a new locking washer, plain washer, and castellated nut, application of corrosion preventative treatment to the contact surfaces of the locking washer, and torqueing the castellated nut. Accomplishment of the actions specified in the service bulletins is intended to adequately address the identified unsafe condition. The LBA classified these service bulletins as mandatory and issued German airworthiness directives 2003-137 and 2003-143, both dated May 15, 2003, to ensure the continued airworthiness of these airplanes in Germany.
These airplane models are manufactured in Germany and are type certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, the LBA has kept us informed of the situation described above. We have examined the findings of the LBA, reviewed all available information, and determined that AD action is necessary for products of this type design that are certificated for operation in the United States.
Explanation of Requirements of Proposed Rule
Since an unsafe condition has been identified that is likely to exist or develop on other airplanes of the same type design registered in the United States, the proposed AD would require accomplishment of the actions specified in the service bulletin described previously, except as discussed below.
Differences Among Alert Service Bulletins, German Airworthiness Directives, and Proposed AD
Whereas the service bulletins and German airworthiness directives do not specify the type of inspection of the hinge bolt of the output rod of the rudder spring tab lever assembly, this proposed AD would require a detailed inspection. A note has been added to define the inspection.
The service bulletins do not describe procedures for corrective action if any broken bolt is found during the inspection, but this proposed AD would require replacement of the bolt per a method approved by either the FAA or the LBA for compliance with this proposed AD.
We estimate that 112 airplanes of U.S. registry would be affected by this proposed AD, that it would take about 1 work hour per airplane to accomplish the proposed inspection and modification, and that the average labor rate is $65 per work hour. Required parts would cost about $205 per airplane. Based on these figures, the cost impact of the proposed AD on U.S. operators is estimated to be $30,240, or $270 per airplane.
The cost impact figure discussed above is based on assumptions that no operator has yet accomplished any of the proposed 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 regulations proposed herein 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. Therefore, Start Printed Page 10381it is determined that this proposal would not have federalism implications under Executive Order 13132.
For the reasons discussed above, I certify that this proposed regulation (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) if promulgated, 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 copy of the draft regulatory evaluation prepared for this action 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
- Air transportation
- Aviation safety
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:Start Part
PART 39—AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
2. Section 39.13 is amended by adding the following new airworthiness directive:
Fairchild Dornier GmbH (Formerly Dornier Luftfahrt GmbH): Docket 2003-NM-120-AD.
Applicability: All Model 328-100 and 328-300 series airplanes, certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent fracture and/or breakage of the hinge bolt of the output rod of the rudder spring tab lever assembly, which could result in migration of the bolt tail, a loose spring tab, and consequent reduced controllability of the airplane, accomplish the following:
One-Time Inspection/Corrective Action/Modification
(a) Within 4 months after the effective date of this AD: Do a one-time detailed inspection of the hinge bolt of the output rod of the rudder spring tab lever assembly for fracture and/or breakage of the hinge bolt by doing all the applicable actions per the Accomplishment Instructions of Dornier Service Bulletin SB-328-27-423 (for Model 328-100 series airplanes) or SB-328J-27-159 (for Model 328-300 series airplanes), both dated February 4, 2002, as applicable.
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.”
(1) If no fracture or breakage is found: Before further flight, modify the hinge bolt by doing all the applicable actions per the Accomplishment Instructions of the applicable service bulletin.
(2) If any fracture or breakage is found: Before further flight, replace the bolt per a method approved by either the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate; or the Luftfahrt-Bundesamt (or its delegated agent); then modify the hinge bolt as required by paragraph (a)(1) of this AD.
Alternative Methods of Compliance
(b) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for this AD.
The subject of this AD is addressed in German airworthiness directives 2003-137 and 2003-143, both dated May 15, 2003.
Issued in Renton, Washington, on February 26, 2004.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 04-4934 Filed 3-4-04; 8:45 am]
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