AD 2005-06-03 ACTIVE

The FAA is adopting a new airworthiness directive (AD) for all McDonnell Douglas Model MD-90-30 airplanes. This AD requires replacing, with improved parts, certain existing fluorescent light lamp holders located in the ceiling panels and life raft ceiling support housings, and behind the overhead stowage compartments in the main cabin. This AD is prompted by reports of failure of fluorescent light lamp holders in the main cabin. We are issuing this AD to prevent chafing of the lamp holder power wire against the mounting bracket, and moisture intrusion into the lamp holders, which could result in failure of the lamp holders and consequent smoke and fire in the airplane cabin.

Final rule.

2005-06-03 McDonnell Douglas: Amendment 39-14011. Docket No. FAA- 2004-19448; Directorate Identifier 2004-NM-134-AD. \n\nEffective Date \n\n\t(a) This AD becomes effective April 20, 2005. \n\nAffected ADs \n\n\t(b) None. \n\nApplicability \n\n\t(c) This AD applies to all Model MD-90-30 airplanes, certificated in any category. \n\nUnsafe Condition \n\n\t(d) This AD was prompted by reports of failure of fluorescent light lamp holders in the main cabin. We are issuing this AD to prevent chafing of the lamp holder power wire against the mounting bracket, and moisture intrusion into the lamp holders, which could result in failure of the lamp holders and consequent smoke and fire in the airplane cabin. \n\nCompliance \n\n\t(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. \n\nReplacement \n\n\t(f) Within 18 months after the effective date of this AD, replace existing fluorescent light lamp holders manufactured by Page Aerospace Limited, part numbers (P/Ns) C779-02-001 and C779-09-001, with improved parts manufactured by Bruce Industries Incorporated, P/Ns BV04055-01-12 and BV04055N-01-12, as specified in Table 1 of this AD. \n\n\tTable 1.--Replacement of Lamp Holders \n\n\n\n\n\nReplace lamp holders in these locations- \nIn accordance with this service information- \nWhich refers to this service information as an \nadditional source of replacement instructions- \n\n\n\n\n\n\n(1) Ceiling panels and life raft ceiling support housings. \nBoeing Alert Service Bulletin MD90-33A012, Revision 3, dated January 14, 2004. \nC & D Aerospace Alert Service Bulletin \n59406XX-25A01; currently at Revision 4, \ndated July 31, 2003. \n\n\n\n\n\n\n(2) Sidewall behind the overhead stowage compartments in the main cabin. \nBoeing Alert Service Bulletin MD90-33A013, dated November 29, 2001. \nC & D Aerospace Alert Service Bulletin \n51310XX-25A01; currently at Revision 5, \ndated March 30,2004. \n\nParts Installation \n\n\t(g) As of the effective date of this AD, no person may install a fluorescent light lamp holder manufactured by Page Aerospace Limited and having P/N C779-02-001 or C779-09-001, in the locations specified in this AD, on any airplane. \n\nReplacements Accomplished Per Previous Issues of Service Bulletin \n\n\t(h) Replacements accomplished before the effective date of this AD per the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-33A012, dated March 28, 2001; Revision 01, dated September 17, 2001; or Revision 02, dated January 17, 2002; are considered acceptable for compliance with paragraph (f) of this AD. \n\nAlternative Methods of Compliance (AMOCs) \n\n\t(i) The Manager, Los Angeles Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. \n\nMaterial Incorporated by Reference \n\n\t(j) You must use the service information that is specified in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of those documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. For copies of the service information, contact Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800- 0024). For information on the availability of this material at the National Archives and Records Administration (NARA), call (202) 741- 6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. \n\n\tYou may view the AD docket at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. \n\n\n\tTable 2.--Material Incorporated by Reference \n\n\n\nService bulletin \nRevision level \nDateBoeing Alert Service Bulletin MD90-3A012. \nBoeing Alert Service Bulletin MD90-33A013.\n3.\nOriginal.\nJanuary 14, 2004. \nNovember 29, 2001.

The FAA proposed to amend 14 CFR Part 39 with an AD for all McDonnell Douglas Model MD-90-30 airplanes. That action, published in the Federal Register on October 26, 2004 (69 FR 62424), proposed to require replacing, with improved parts, certain existing fluorescent light lamp holders located in the ceiling panels and life raft ceiling support housings, and behind the overhead stowage compartments in the main cabin. \n\nComments\n\n\tWe provided the public the opportunity to participate in the development of this AD. We have considered the single comment submitted on the proposed AD. \n\nRequest To Specify Part Numbers of Existing and Replacement Lamp Holders \n\n\tThe commenter requests that we revise the proposed AD to specify the part numbers of fluorescent light lamp holders determined to be defective and the part numbers of acceptable replacement fluorescent light lamp holders. The commenter states that there may be other acceptable replacement parts, butthis is difficult to determine without knowing the part numbers. \n\n\tWe concur. The part numbers of the defective and replacement fluorescent light lamp holders are identified in C & D Aerospace Alert Service Bulletins 59406XX-25A01, currently at Revision 4, dated July 31, 2003; and 51310XX-25A01, currently at Revision 5, dated March 30, 2004. The proposed AD refers to those service bulletins as additional sources of instructions for accomplishing the replacement. For the convenience of affected operators, we have revised paragraphs (f) and (g) of this AD to include the relevant part numbers. \n\nConclusion \n\n\tWe have carefully reviewed the available data, including the comment that was submitted, and determined that air safety and the public interest require adopting the AD with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD. \n\nCosts of Compliance \n\n\tThis AD willaffect about 84 airplanes worldwide and 21 airplanes of U.S. registry. The required actions will take about 98 work hours per airplane, at an average labor rate of $65 per work hour. Required parts will cost about $27,158 per airplane. Based on these figures, the estimated cost of this AD for U.S. operators is $704,088, or $33,528 per airplane. \n\nAuthority for This Rulemaking \n\n\tTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's authority. \n\n\tWe are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, "General requirements." Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. \n\nRegulatory Findings \n\n\tWe have determined that this AD will not have federalism implications under Executive Order 13132. This AD 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. \n\n\tFor the reasons discussed above, I certify that this AD: \n\n\t(1) Is not a "significant regulatory action" under Executive Order 12866; \n\n\t(2) Is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and \n\n\t(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.We prepared a regulatory evaluation of the estimated costs to comply with this AD. See the ADDRESSES section for a location to examine the regulatory evaluation. \n\nList of Subjects in 14 CFR Part 39 \n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. \n\n\nAdoption of the Amendment \n\nAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n1. 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\n2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD):

For service information identified in this AD, contact Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024). \n\n\tDocket: The AD docket contains the proposed AD, comments, and any final disposition. You can examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647- 5227) is located on the plaza level of the Nassif Building at the U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Washington, DC. This docket number is FAA-2004-19448; the directorate identifier for this docket is 2004-NM-134-AD.

George Mabuni, Aerospace Engineer, Systems and Equipment Branch, ANM-130L, FAA, Los Angeles Aircraft Certification Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137; telephone (562) 627-5341; fax (562) 627-5210.