Airworthiness directives › 97-04-03
AD 97-04-03 Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines
Makes named: cessna. Models named: TFE731-2A, -3C, -3CR series turbofan, 650 Citation III. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
AlliedSignal Inc. Models TFE731-2A, -3C and -3CR series turbofan engines, with first stage low pressure turbine (LPT) seal plates, Part Number (P/N) 3073552-2 and P/N 3074053-1, installed on but not limited to the following aircraft: Cessna Model 650 Citation III and Israel Aircraft Industries Model 1125 Westwind Astra aircraft. Note 1: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless [[Page 10202]] 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 (d) 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.
Compliance
Required as indicated, unless accomplished previously. To prevent fatigue cracking and subsequent uncontained failure of a first stage LPT seal plate, accomplish the following: (a) Prior to accumulating 3,700 cycles since new (CSN) on LPT seal plates, P/Ns 3073552-2 and 3074053-1, remove from service these first LPT seal plates, and replace with serviceable parts, in accordance with the Accomplishment Instructions of AlliedSignal Inc. Service Bulletin (SB) No. TFE731-72-3573, dated August 15, 1995. (b) This action establishes a new, reduced cyclic life limit of 3,700 CSN for first stage LPT seal plates, P/N 3073552-2 and P/N 3074053-1. (c) Except as provided in paragraph (d) of this AD, no alternative replacement times may be approved for LPT seal plates, P/N 3073552-2 and 3074053-1. (d) 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. (e) 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. (f) The actions required by this AD shall be done in accordance with the following AlliedSignal Inc. SB: ------------------------------------------------------------------------ Document No. Pages Date ------------------------------------------------------------------------ TFE731-72-3573..................... 1-6 August 15, 1995 ------------------------------------------------------------------------ Total Pages: 6. 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. (g) This amendment becomes effective on May 5, 1997. Issued in Burlington, Massachusetts, on February 26, 1997. James C. Jones, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 97-5512 Filed 3-5-97; 8:45 am] BILLING CODE 4910-13-U
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1