AD 95-22-01

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Aerospace Lighting Corporation (ALC) lamp connectors and fluorescent lamps, that currently requires an inspection, and adjustment or replacement of improperly installed, damaged, or improperly configured lamp connectors and fluorescent lamps used in cabin fluorescent lighting systems. This amendment adds an optional replacement of certain power units and power supplies with new technology parts as terminating action to the repetitive inspections. This amendment is prompted by the availability of new technology components. The actions specified by this AD are intended to prevent smoke, fire, electrical shock, and possible electromagnetic interference caused by high voltage arcing in the cabin which, if undetected, could result in personal hazard or loss of the aircraft.

Final rule.

95-22-01 Aerospace Lighting Corporation: Amendment 39-9408. Docket 94-ANE-31. Supersedes AD 90-14-06, Amendment 39-6640. \n\n\tApplicability: Aerospace Lighting Corporation (ALC) lamp connectors, Part Number (P/N) 31.85.1.A; Series 66 fluorescent lamps; power units, P/N's TR-991, TR-992, AL-0546, and AL-0514; and power supplies, P/N's 1895D and AL-0598. These products are utilized in cabin fluorescent lighting systems, and are installed on, but not limited to, the following aircraft: Airbus Industrie Model A310; Avion Marcel Dassault Breguet Aviation Model Falcon 10; Boeing Airplane Company Models 727, 737, 747, and 757; Raytheon Corporate Jets, Inc. (formerly British Aerospace) Model HS.125-600A, -700A, -800A, and -1000A; Bombardier Inc. Canadair Ltd. Models CL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600-2B19, CL-601, CL-601-3A, CL-601-3R; Cessna Aircraft Company Models 550 and 560; Dassault Aviation Models Mystere-Falcon 20 and 50; Empresa Brasileira de Aeronauctica S/A ModelEmbraer EMB-120; Gulfstream Aerospace Corporation Models G-159, G-1159, G-1159A, and G-IV; Israel Aircraft Industrie, Ltd. Models 1124 and 1125; Jetstream Aircraft, Ltd. Jetstream Model 310; Learjet Corporation Models Learjet 35 and 36; Saab Aircraft AB Model Saab 340A; and Sikorsky Aircraft Division Model S-76A. NOTE: This airworthiness directive (AD) applies to each product 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 products that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (e) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any product from the applicability of this AD. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo prevent smoke, fire, electrical shock, and possible electromagnetic interference caused by high voltage arcing in the cabin which, if undetected, could result in personal hazard or loss of the aircraft, accomplish the following: \n\n\t(a)\tWithin 30 calendar days of the effective date of this airworthiness directive (AD), accomplish the following: \n\n\t\t(1)\tInspect the cabin fluorescent lighting system in accordance with ALC Information Bulletin No. IB 90-001, dated August 15, 1992, paragraph IV. "Fluorescent Lighting System Components Identification and Inspection Procedure," subparagraphs B.1, 2., 3., 5., 6., and 7. \n\n\t\t(2)\tAfter completing the inspection above in paragraph (a)(1) of this AD, remove and replace any part(s) found to be damaged or improperly configured in accordance with paragraph IV. B.4, 8., and 9., as required, of ALC Information Bulletin No. IB 90-001, dated August 15, 1992. \n\n\t(b)\tWithin 5 flights or 10 flight hours, whichever occurs first, of a cabin fluorescent lighting system components failure, repeat the removal and replacement procedures of paragraph (a)(2) of this AD. \n\n\t(c)\tAn alternative method of compliance with paragraphs (a)(1), (a)(2), and (b) of this AD would be to turn the fluorescent lighting system off and to placard the system to prevent unintentional activation. \n\n\t(d)\tReplacement of the following ALC parts, in accordance with the following instructions, constitutes terminating action to the inspections required by paragraph (b) of this AD. These actions are: \n\n\t\t(1)\tRemove power units, P/N TR-991 or AL-0546, and replace with protected power units, P/N AL-5117, in accordancewith ALC Installation Instruction (II) No. AL-11025M, dated March 15, 1992. \n\n\t\t(2)\tRemove power units, P/N TR-992 or AL-0514, and replace with protected power unit, P/N AL-5112, in accordance with ALC II No. AL-11024M, dated March 15, 1992. \n\n\t\t(3)\tRemove power supplies, P/N 18-95D or AL-0598 and dimmer, P/N 22-311 or AL-0542, and replace with protected power supply, P/N AL-5118 or AL-5130, in accordance with ALC II No. AL-11023M, Revision A, dated May 20, 1994. \n\n\t(e)\tAn 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, New York Aircraft Certification Office. The request should be forwarded through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York Aircraft Certification Office. \n\nNOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York Aircraft Certification Office. \n\n\t(f)\tSpecial 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 aircraft to a location where the requirements of this AD can be accomplished. \n\n\t(g)\tThe actions required by this AD shall be done in accordance with the following service documents: \n\n\nDocument No.\nPages\nRevision\nDate\nALC II AL-11023M\nTotal pages: 18.\n1-18\nA\nMay 20, 1994\nALC II AL-11024M\nTotal pages: 9.\n1-9\nOriginal\nMarch 15, 1992\nALC II AL-11025M\nTotal pages: 9.\n1-9\nOriginal\nMarch 15, 1992\nALC No. IB 90-001\n1\nRevision\nAugust 15, 1992\n\n2-8\nOriginal\nMarch 30, 1990\n\n9\nRevision\nAugust 15, 1992\n\n10-13\nOriginal\nMarch 30, 1990\nTotal pages: 13.\n\n\n\n\nThis 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 Aerospace LightingCorporation, 101-8 Colin Drive, Holbrook, NY 11741; telephone (516) 563-6400, fax (516) 563-8781. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief 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. \n\n\t(h)\tThis amendment becomes effective on December 4, 1995.

A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) by superseding AD 90-14-06, Amendment 39-6640 (55 FR 27457, July 3, 1990), which is applicable to Aerospace Lighting Corporation (ALC) lamp connectors, Part Number (P/N) 31.85.1.A, and Series 66 fluorescent lamps, was published in the Federal Register on January 4, 1995 (60 FR 382). That action proposed to continue to require an inspection, and adjustment or replacement of improperly installed, damaged, or improperly configured lamp connectors and fluorescent lamps used in cabin fluorescent lighting systems in accordance with ALC Information Bulletin No. IB 90-001, dated August 15, 1992. That AD also proposed to add an optional replacement of power units, and power supplies and dimmers, with new technology protected power units, and protected power supplies, as applicable. Installation of these protected power units and protected power supplies constitutes terminating actionto the repetitive inspections. The actions required by that proposed AD would be required to be accomplished in accordance with the following ALC Installation Instructions (II): AL-11023M, Revision A, dated May 20, 1994; AL-11024M, dated March 15, 1992; and AL-11025M, dated March 15, 1992. These II's describe procedures for installing improved design protected power units, and protected power supplies, as applicable.\n\n\tInterested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the comments received.\n\n\tThree commenters support the rule as proposed.\n\n\tOne commenter suggests that the real problem lies with Series "66" lamps, which have spring tension split rings that cause arcing as the lamps wear. The commenter suggests that a terminating action need only require replacing all Series "66" lamps with Series "AL-12" lamps. The FAA does not concur. While the FAA agrees that replacing the Series "66" lamps will eliminate the lamp connection as a possible arcing site, the rest of the lamp output loop contains the same arcing potential as the lamp connector. The FAA has determined that replacing the Series "66" lamps is not a satisfactory terminating action as it does not completely prevent arcing in the aircraft from fluorescent lighting high voltage.\n\n\tThe manufacturer states that the economic analysis work hours and parts should be lowered to better reflect field practice. The FAA concurs and the economic analysis has been revised accordingly.\n\n\tThe manufacturer also states that the list of aircraft installations in the applicability should be revised to delete a Beech model and add certain Raytheon Corporate Jets, Inc. and Bombardier Inc. Canadair models. The FAA concurs and this final rule has been revised accordingly.\n\n\tThe manufacturer also commented that the ALC part numbers listed in paragraphs (d)(3) and (d)(4) of the proposed rule represented the same unit. The manufacturer suggests that paragraphs (d)(3) and (d)(4) can be combined into a single paragraph. The FAA concurs. The part number for ALC P/N 18-95D was changed in January 1991 to P/N AL-0598, and P/N 22-311 to P/N AL-0542. These old and new part number units are functionally and physically identical. ALC has integrated the dimmer functions of P/N 22-311 and P/N AL-0542 into power units P/N AL-5118 and P/N AL-5130. Because of these changes, the FAA has revised paragraphs (d)(3) and (d)(4) by combining them into a single paragraph (d)(3) in the final rule.\n\n\tThe manufacturer also states that the word "removal" should be deleted from paragraph (a)(2). The FAA does not concur. Operators are required to remove unserviceable parts and then replace those parts with serviceable parts. The FAA has, however, reworded paragraph (a)(2) for clarity and to update the referenced service information.\n\n\tLastly, the manufacturer states that paragraph (d)(2) should provide that the optional replacement actions constitute alternative methods of compliance with the AD. The FAA does not concur. The replacement actions in paragraph (d)(2) work to end an operator's obligation to continue repetitive inspections, and, therefore, compliance with those inspection requirements of the AD. The FAA views those actions as an end to the AD for that operator rather than as an alternate method of complying with the AD.\n\n\tAfter 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.\n\n\tThe FAA estimates that it will take approximately 1 work hour per power unit or power supply to accomplish the required actions, and that the average labor rate is $60 per work hour. Required parts will cost approximately $400 per power unit or $900 per power supply. Based on these figures, the cost impact of the AD on U.S. operators is estimated to be $460 per power unit or $960 per power supply.\n\n\tThe regulations adopted herein will not have substantial direct effects 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, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment.\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\tAir Transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.\n\nAdoption of the Amendment \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\t1. The authority citation for part 39 continues to read as follows:\n\tAuthority: 49 USC 106(g), 40101, 40113, 44701.\n\n§39.13 - (AMENDED)\n\t2. Section 39.13 is amended by removing Amendment 39-6640 (55 FR 27457, July 3, 1990) and by adding a new airworthiness directive, Amendment 39-9408, to read as follows: