95-21-20: Inspect APU

95-21-20 FOKKER: Amendment 39-9407. Docket 95-NM-52-AD. Applicability: Model F28 Mark 0100 series airplanes, serial numbers 11244 through 11405 inclusive, 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 use the authority provided in paragraph (b) of this AD to request approval from the 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 thepresence of any modification, alteration, or repair remove any airplane from the applicability of this AD. Compliance: Required as indicated, unless accomplished previously. To prevent electrical arcing between the flexible fuel drain line and starter motor positive terminal of the auxiliary power unit (APU), which could lead to a fire in the APU, accomplish the following: (a) Within 14 days after the effective date of this AD, perform a visual inspection of the APU to detect damage of the flexible fuel drain line and its braiding, in accordance with Fokker Service Bulletin SBF100-49-023, dated November 20, 1992. (1) If no damage is detected, prior to further flight, install two additional clamps on the fuel supply line and flexible fuel drain line, in accordance with the service bulletin. (2) If any damage is detected, prior to further flight, replace the flexible fuel drain line with a new or serviceable drain line, and install two additional clamps on thefuel supply line and flexible fuel drain line, in accordance with the service bulletin. (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 inspection, installations, replacement and shall bedone in accordance with Fokker Service Bulletin SBF100-49-023, dated November 20, 1992. 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 Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. 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 November 17, 1995.