2003-16-04: Fuel heaters

2003-16-04 Pratt & Whitney Canada: Amendment 39-13257. Docket No. 2001NE-34-AD. Applicability This airworthiness directive (AD) applies to Pratt & Whitney Canada (PWC) engine models PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126A, PW127, PW127E, PW127F, PW127G turboprop engines. These engines are installed on, but not limited to the following airplanes: Aerospatiale ATR-42 and -72; Bombardier DHC-8 series 100, 200, and 300, CL-215T and -415; Construcciones Aeronautics, S.A. (CASA) C- 295; Empresa Brasileira de Aeronautica S.A. (EMBRAER) EMB-120; Fairchild Dornier 328, Fokker 50; BAE Systems (Operations) Ltd. ATP. 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 You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. To prevent the separation of the fuel filter bowl from the fuel heater, which could result in a pressurized fuel leak and possible engine fire, do the following: (a) Replace, on PWC engines, Stewart Warner fuel heater part number (P/N) series 10718, with fuel heater P/N series 10839 or other acceptable parts identified under the PWC Interchangeable Control Part Number, at the next removal of the engine low pressure fuel filter, but not later than 90 days after the effective date of this AD. (b) Do not install on PWC engines any Stewart Warner fuel heater P/N series 10718, after the effective date of this AD. 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, Engine Certification Office (ECO). Operators must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO. Special Flight Permits (d) Special flight permits may be issued in accordance with 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199)to operate the airplane to a location where the requirements of this AD can be done. Note 3: The subject of this AD is addressed in Transport Canada airworthiness directive CF-2000-34, dated November 23, 2000. Effective Date (e) This amendment becomes effective on September 10, 2003.