AD 96-03-14 Airworthiness Directives; Boeing Model 747-400 Series Airplanes

Models named: 747-400 series. Read the applicability below — it usually turns on serial or part numbers too.

Model 747-400 series airplanes; line positions 696 through 1046 inclusive, except airplane variable numbers RT502 and RU032 (airplane serial numbers 24062 and 25780, respectively); certificated in any category. Note 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 (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 condition has not been eliminated, the request should include specific proposed actions to address it.

Required as indicated, unless accomplished previously. To prevent the inability to shut off the supply of fuel in the event of an engine fire, accomplish the following: (a) Within 12 months after the effective date of this AD, replace the fuel shutoff valve wire and sleeve with a wire in two non-metallic sleeves in the conduit in the struts of each engine, in accordance with Boeing Alert Service Bulletin 747-28A2186, dated January 19, 1995. Note 2: Replacements accomplished prior to the effective date of this amendment in accordance with Boeing Alert Service Bulletin 747- 54A2157, dated January 12, 1995, or Revision 1, dated August 3, 1995; or Boeing Alert Service Bulletin 747-54A2156, dated December 15, 1994, or Revision 1, dated July 20, 1995; are considered acceptable for compliance with the replacements specified in this amendment. (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, Seattle Aircraft Certification Office (ACO), 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, Seattle ACO. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. (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 replacement shall be done in accordance with Boeing Alert Service Bulletin 747-28A2186, dated January 19, 1995. 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 Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. 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. (e) This amendment becomes effective on March 22, 1996. Issued in Renton, Washington, on February 5, 1996. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 96-2869 Filed 2-20-96; 8:45 am] BILLING CODE 4910-13-P