AD 97-21-07 Airworthiness Directives; AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft Engines

Makes named: lycoming. Models named: T5313B, 205A-1, 205B series. Read the applicability below — it usually turns on serial or part numbers too.

AlliedSignal Inc. (formerly Textron Lycoming) Model T5313B and T5317A series commercial turboshaft engines, and T53 series military turboshaft engines approved for installation on aircraft certified in accordance with Section 21.25 of the Federal Aviation Regulations (FAR), with accessory drive carrier assemblies, part numbers (P/Ns) 1-070-220-03, 1-070-220-12, and 1-070-220-13, that were installed after November 1, 1985, and have serial numbers (S/Ns) listed in AlliedSignal Inc. Alert Service Bulletins (ASBs) No. T5313B/17A-A0092, Revision 1, dated July 1, 1997; ASB No. T53-L- 13B-A0092, dated June 4, 1997; or ASB No. T53-L-703-A0092, dated June 4, 1997. These engines are installed on but not limited to Bell Helicopter Textron Model 205A-1 and 205B series helicopters and the following military helicopters certified in accordance with Section 21.25 of the FAR: UH-1A through E; UH-1G, H, L, M; AH-1F, Q, G, S; HH-1H, K; TH-1L; OV-1C, D; and HH-43. Note 1: A shipping records, engine logbooks, work orders, and parts invoices review may allow an owner or operator to determine if this AD applies. Note 2: 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 accessory drive carrier assembly failure, which could result in an N2 overspeed and an uncontained engine failure, accomplish the following: (a) Within 100 hours time in service (TIS), or 6 months after the effective date of this AD, whichever occurs first, accomplish the following in accordance with AlliedSignal Inc. ASB No. T5313B/ 17A-A0092, Revision 1, dated July 1, 1997; ASB No. T53-L-13B-A0092, dated June 4, 1997; and ASB No. T53-L-703-A0092, dated June 4, 1997, as applicable: (1) Visually inspect to determine if the accessory drive carrier assembly is marked with an affected S/N listed in the applicable ASBs. (2) If the accessory drive carrier assembly is not marked with an affected S/N listed in the applicable ASB, no further action is required. (3) If the accessory drive carrier assembly is marked with an affected S/N listed in the applicable ASB, or the serial number cannot be positively determined, remove the accessory drive carrier assembly from service and replace with a serviceable assembly. (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. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles Aircraft Certification Office. Note 3: 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 Inc. ASBs: ---------------------------------------------------------------------------------------------------------------- Document No. Pages Revision Date ---------------------------------------------------------------------------------------------------------------- T5313B/17A-A0092................... 1-7 1................................ July 1, 1997. [[Page 33541]] Total pages: 7. T53-L-13B-A0092.................... 1-7 Original......................... June 4, 1997. Total pages: 7. T53-L-703-A0092.................... 1-7 Original......................... June 4, 1997 Total pages: 7. ---------------------------------------------------------------------------------------------------------------- The incorporation by reference of AlliedSignal Inc. ASB No. T5313B/ 17A-A0092, Revision 1, dated July 1, 1997, ASB No. T53-L-13B-A0092, dated June 4, 1997, and ASB No. T53-L-703-A0092, dated June 4, 1997, was approved previously by the Director of the Federal Register as of November 3, 1997 (62 FR 53935, October 17, 1997). 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 Regional 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 July 6, 1998. Issued in Burlington, Massachusetts, on June 11, 1998. Jay J. Pardee, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 98-16272 Filed 6-18-98; 8:45 am] BILLING CODE 4910-13-U