AD 2002-14-10

This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 and -11F airplanes, that requires replacing the wire harness support bracket of the integrated drive generator (IDG) of the forward engine mounts with a new support bracket, and modifying the angle of the bracket near the oil filter. The actions specified by this AD are intended to prevent arcing of the IDG wire harness, which could result in smoke and/or fire in the area of the forward engine mount bolt retainer and/or fire detector responder. This action is intended to address the identified unsafe condition.

Final rule.

2002-14-10 McDonnell Douglas: Amendment 39-12810. Docket 2001-NM- 64-AD. \n\n\tApplicability: Model MD-11 and -11F airplanes, certificated in any category; equipped with United Technologies Pratt & Whitney Model PW4460 or PW4462 engines, engine buildup units having neutral quick engine change, cum units 4 through 240 inclusive and serial numbers 5166001 through 5213003 inclusive. \n\n\tNote 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 (c) 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. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo prevent arcing of the integrated drive generator (IDG) wire harness, which could result in smoke and/or fire in the area of the forward engine mount bolt retainer and/or fire detector responder, accomplish the following: \n\nReplacement and Modification \n\n\t(a) Within 1 year after the effective date of this AD, replace the wire harness support bracket of the IDG of the forward engine mounts with a new support bracket, and modify the angle of the bracket near the oil filter (i.e., cut and grind flanges, deburr edges, fusion weld flanges, and reidentify bracket), per Boeing Alert Service Bulletin MD11-71A086, Revision 01, dated May 21, 2001. \n\n\tNote 2: Boeing Alert Service Bulletin MD11-71A086 references United Technologies Pratt & Whitney Service Bulletin PW4MD11 71-107, dated May 15, 1996, as an additional source of service information for accomplishing the proposed replacement and modification. \n\nSpares \n\n\t(b) As of the effective date of this AD, no United Technologies Pratt & Whitney Model PW4460 or PW4462 engines, engine buildup units having neutral quick engine change, cum units 4 through 240 inclusive and serial numbers 5166001 through 5213003 inclusive, shall be installed on any airplane unless the requirements of paragraph (a) of this AD have been done. \n\nAlternative Methods of Compliance \n\n\t(c) 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, Los Angeles Aircraft Certification Office (ACO), FAA. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles ACO. \n\n\tNote 3: Information concerning the existence of approved alternative methods ofcompliance with this AD, if any, may be obtained from the Los Angeles ACO. \n\nSpecial Flight Permit \n\n\t(d) Special flight permits may be issued in accordance with sections 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. \n\nIncorporation by Reference \n\n\t(e) The replacement and modification shall be done in accordance with Boeing Alert Service Bulletin MD11-71A086, Revision 01, dated May 21, 2001. 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 Aircraft Group, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024). Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA,Los Angeles Aircraft Certification Office, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. \n\nEffective Date \n\n\t(f) This amendment becomes effective on August 23, 2002.

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 McDonnell Douglas Model MD-11 and -11F airplanes was published in the Federal Register on October 5, 2001 (66 FR 50880). That action proposed to require replacing the wire harness support bracket of the integrated drive generator of the forward engine mounts with a new support bracket, and modifying the angle of the bracket near the oil filter. \n\nComments \n\n\tInterested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the single comment received. \n\n\tThe commenter supports the proposed rule. \n\nExplanation of Change to Applicability \n\n\tThe FAA has revised the applicability of the existing AD to identify model designations as published in the most \nrecent type certificate data sheet for the affected models. \n\nConclusionAfter careful review of the available data, including the comment 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. \n\nCost Impact \n\n\tThere are approximately 195 Model MD-11 and -11F airplanes of the affected design in the worldwide fleet. The FAA estimates that 67 airplanes of U.S. registry will be affected by this AD, that it will take approximately 3 work hours per airplane to accomplish the required actions, and that the average labor rate is $60 per work hour. Required parts will be provided by the engine manufacturer at no cost to the operators. Based on these figures, the cost impact of the AD on U.S. operators is estimated to be $12,060, or $180 per airplane. \n\n\tThe cost impact figure discussed above is 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. \n\nRegulatory Impact \n\n\tThe 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. \n\n\tFor 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. \n\nList of Subjects in 14 CFR Part 39 \n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. \n\nAdoption of the Amendment \n\n\tAccordingly, 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: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n\t1. The authority citation for part 39 continues to read as follows: \n\n\tAuthority: 49 U.S.C. 106(g),40113, 44701. \n\nSec. 39.13 (Amended) \n\n\t2. Section 39.13 is amended by adding the following new airworthiness directive: