89-15-10: Nozzle Vent Manifold

89-15-10 TEXTRON LYCOMING: Amendment 39-6377. Final copy of Priority Letter AD. Applicability: Model TIO-540-AE2A engines (with serial numbers up to and including L9064-61A) installed in Piper PA-46-350P airplanes certified in any category. Compliance: Required within 5 hours in service after the effective date of this AD unless already accomplished. To prevent engine roughness and loss of engine power, accomplish the following: (a) Perform a fuel leak check at the upper deck left nozzle vent manifold or at the fuel pump vent hose check valve in accordance with Appendix I and Appendix II of this AD. Observe if any fuel emerges at the disconnected line with the aircraft emergency boost pump operating. If fuel is observed, the engine pump diaphragm is considered defective. Prior to further flight, replace pump with a new or serviceable pump and repeat the above leak check. (b) Remove tee fitting P/N AN-825-4 from the engine fuel pump vent and install restrictor typetee fitting P/N 02A21171 (Piper P/N 766-224) in accordance with Appendix I and Appendix II of this AD. (c) Aircraft may be ferried in accordance with the provisions of FAR's 21.197 and 21.199 to a base where the AD can be accomplished. (d) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance schedule specified in this AD may be approved by the Manager, New York Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, Room 202, 181 South Franklin Avenue, Valley Stream, New York 11581. This amendment (39-6377, AD 89-15-10) becomes effective on November 30, 1989, as to all persons except those persons to whom it was made immediately effective by priority letter AD No. 89-15-10, issued on July 26, 1989, which contained this amendment. APPENDIX I NOTE: TEXTRON Lycoming Service Bulletin No. 487, dated July 7, 1989, pertain to these inspections. APPENDIX II NOTE: PIPER Service Bulletin No. 915, dated July 8, 1989, pertain to these inspections.