AD 2001-22-07 Airworthiness Directives; Honeywell International, Inc. LTP 101 Series Turboprop and LTS101 Series Turboshaft Engines

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

This airworthiness directive (AD) is applicable to Honeywell International, Inc. (formerly AlliedSignal Inc. and Textron Lycoming) LTP 101 series turboprop and LTS101 series turboshaft engines with the following part numbers (P/N's) rigid tube fuel manifolds installed: Table 1.—P/N's of Affected Rigid Tube Fuel Manifolds         4-301-042-02 4-301-042-06 4-301-236-03 4-301-286-02 4-301-042-04 4-301-236-01 4-301-236-04 4-301-376-01 4-301-042-05 4-301-236-02 4-301-286-01 These engines are installed on, but not limited to Aerospatiale AS350, Eurocopter MBB-BK117 and HH-65A, Bell 222, Page Thrush, Air Tractor AT-302, Piaggio P.166-DL3, Riley International R421, and Pacific Aero 08-600 aircraft. Note 1: This 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 (c) 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 with this AD is required as specified below, unless already done. To prevent engine fuel leakage due to low-cycle fatigue (LCF) cracking of the rigid tube fuel manifold, which could result in an in-flight fire, do the following: (a) Replace fuel manifolds that have accumulated the following gas generator rotor (Ng) cycles-since-new (CSN) on the effective date of this AD or Ng cycles-in-service (CIS) on the effective date of this AD since all tubes were replaced: Table 2.—Fuel Tube Replacement Schedule Ng CSN, or Ng CIS since total tube replacement Replacement schedule (1) 2,750 or less Before accumulating 3,000 total Ng cycles. (2) More than 2,750 Within 250 CIS after the effective date of this AD. (3) Unknown (i) Within 2,000 CIS after the effective date of this AD; or (ii) At the next engine removal; or (iii) At the removal of the fuel manifold for cause, whichever is first. New Life Limitation (b) Do not install fuel manifolds with P/N's that are listed in Table 1 of this AD after the effective date of this AD if they meet ANY of the following conditions: (1) The manifold has accumulated 3,000 or more total Ng cycles; or (2) The manifold has had partial tube replacements; or (3) The manifold has an unknown number of Ng cycles. Alternative Methods of Compliance (c) 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 (LAACO). Operators must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, LAACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the LAACO. Special Flight Permits (d) Special flight permits may be issued in accordance §§ 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. Effective Date (e) This amendment becomes effective on November 30, 2001. Issued in Burlington, Massachusetts, on October 19, 2001. Jay J. Pardee, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 01-26967 Filed 10-25-01; 8:45 am] BILLING CODE 4910-13-U