97-17-05: Gas Generator Case Drain Ports

97-17-05 Pratt & Whitney Canada: Amendment 39-10107. Docket 97-ANE-32-AD. Applicability: Pratt & Whitney Canada (PWC) Pratt & Whitney Canada (PWC) PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW124B, PW125B, PW126A, PW127, PW127E, and PW127F series turboprop engines installed on but not limited to Dornier 328, Fokker 50, Jetstream ATP, Aerospatiale ATR42, ATR42-500, ATR72, Embraer EMB-120, and deHavilland Dash-8-100/-200/- 300/-315 engines. 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. Compliance: Required as indicated, unless accomplished previously. To prevent a nacelle fire caused by fluid leaking from the gas generator case drain ports, accomplish the following: (a) Within 10 hours time in service after the effective date of this AD, visually inspect the two gas generator case drain ports and ensure that they are connected to drain lines or capped, as applicable, to the appropriate aircraft installation configuration in accordance with PWC Service Information Letter (SIL) No. PW100-003, issued June 18, 1997. (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, Engine 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, Engine 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 Engine 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 performed in accordance with the following PWC SIL: Document No. Pages Date PW100-003 1 June 18, 1997 Total pages: 1. 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 Pratt & Whitney Canada, 1000 Marie-Victorin, Longueuil, Quebec, Canada J4G 1A1; telephone (514) 647-2866, fax (514) 647-2888. 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 September 9, 1997.