97-21-15: Electrical System In Electrical Equip. Bay

97-21-15 BRITISH AEROSPACE REGIONAL AIRCRAFT (Formerly British Aerospace Regional Aircraft Limited, Avro International Aerospace Division; British Aerospace, PLC; British Aerospace Commercial Aircraft Limited): Amendment 39-10168. Docket 97-NM-05-AD. Applicability: All Model Avro 146-RJ series airplanes, certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise 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 (b) 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 conditionhas not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent possible overheating of the electrical generator feeder cables and consequent damage, which could lead to possible fire or loss of essential electrical systems, accomplish the following: (a) Prior to the accumulation of 500 flight cycles after the effective date of this AD, modify the electrical system in the electrical equipment bay in accordance with British Aerospace Service Bulletin SB.24-113-01532A, dated March 12, 1996, or British Aerospace Service Bulletin SB.24-113-01532A, Revision 1, dated June 18, 1996. (b) 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, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113. NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (c) 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. (d) The modification shall be done in accordance with British Aerospace Service Bulletin SB.24-113-01532A, dated March 12, 1996; or British Aerospace Service Bulletin SB.24-113- 01532A, Revision 1, dated June 18, 1996, which contains the following list of effective pages: Page Number Revision Level Shown on Page Date Shown on Page 1, 2 1 June 18, 1996 3-15 Original March 12, 1996 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 AI(R) American Support, Inc., 13850 McLearen Road, Herndon, Virginia 20171. 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. NOTE 3: The subject of this AD is addressed in British airworthiness directive 006-03-96, dated March 12, 1996. (e) This amendment becomes effective on November 24, 1997.