AD 97-07-05 Airworthiness Directives; AlliedSignal Inc. T5311, T5313, T5317, and T53 (Military) Series Engines

Makes named: grumman, lycoming. Read the applicability below — it usually turns on serial or part numbers too.

AlliedSignal Inc. (formerly Textron Lycoming) T5311, T5313, T5317, and T53 (military) series turboshaft engines, installed on but not limited to Bell Helicopter Textron 209, 205, and 204 series, and Kaman K-1200 series aircraft, and the following military aircraft: Bell Helicopter Textron AH-1 and UH-1, and Grumman OV-1 (turboprop installation), certified in accordance with Section 21.25 or 21.27 of the Federal Aviation Regulations (FAR). Note 1: This airworthiness directive (AD) applies to each engine 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 engines 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 N2 accessory drive assembly disengagement due to N2 spur gear nut retainer (lock cup) separation, which could result in an uncommanded engine acceleration, accomplish the following: (a) Within 300 hours time in service, or 2 years after the effective date of this AD, whichever occurs first, remove from service N2 spur gear nut retainers (lock cups), Part Number (P/N) 1- 070-066-01, and replace with N2 spur gear nut retainers P/Ns 1-070- 066-02 or 1-070-066-03, in accordance with the following applicable AlliedSignal Aerospace Service Bulletins (SBs): (1) For retainers installed on T5311 and T53-L-11 (military) series engines, in accordance with SB No. T5311/T53-L-11-0080, dated May 28, 1996. (2) For retainers installed on T5313B and T5317 series engines, in accordance with SB No. T5313B/T5317-0081, Revision 1, dated May 28, 1996. (3) For retainers installed on T53-L-13B/SSA/SSB (military) series engines, in accordance with SB No. T53-L-13B-0082, Revision 1, dated October 25, 1996. (4) For retainers installed on T53-L-13B/SSD (military) series engines, in accordance with SB No. T53-L-13B/D-0083, dated May 28, 1996. (5) For retainers installed on T53-L-703 (military) series engines, in accordance with SB No. T53-L-703-0084, Revision 1, dated October 25, 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, Los Angeles 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, Los Angeles Aircraft Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Los Angeles Aircraft Certification Office. (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 aircraft to a location where the requirements of this AD can be accomplished. (d) The actions required by this AD shall be done in accordance with the following AlliedSignal Engines SBs: ---------------------------------------------------------------------------------------------------------------- Document No. Pages Revision Date ---------------------------------------------------------------------------------------------------------------- T5311/T53-L-11-0080.................... 1-4 Original................... May 28, 1996. Total Pages: 4. T5313B/T5317-0081...................... 1-4 1.......................... May 28, 1996. Total Pages: 4. T53-L-13B-0082......................... 1-4 1.......................... October 25, 1996. Total Pages: 4. T53-L-13B/D-0083....................... 1-4 Original................... May 28, 1996. Total Pages: 4. T53-L-703-0084......................... 1-4 1.......................... October 25, 1996. Total Pages: 4. ---------------------------------------------------------------------------------------------------------------- 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 AlliedSignal Aerospace, Attn: Data Distribution, M/S 64-3/2101-201, P.O. Box 29003, Phoenix, AZ 85038-9003; telephone (602) 365-2493, fax (602) 365-5577. 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. (e) This amendment becomes effective on June 24, 1997. [[Page 20102]] Issued in Burlington, Massachusetts, on April 8, 1997. Jay J. Pardee, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 97-10766 Filed 4-24-97; 8:45 am] BILLING CODE 4910-13-U