Airworthiness Directive · Amendment 39-13257 · Pratt & Whitney Canada Turboprop Engines
Pratt & Whitney Canada Turboprop Engines
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, PW126, PW126A, PW127, PW127B, PW127E, PW127F, PW127G, PW127H, and PW127J 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 and 60; Ilyushin IL-114-100; BAE Systems (Operations) Ltd. ATP; and XIAN MA-60.
This amendment adopts a new airworthiness directive (AD) that 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, PW126, PW126A, PW127, PW127B, PW127E, PW127F, PW127G, PW127H, and PW127J turboprop engines. This amendment requires replacing certain Stewart Warner part number (P/N) fuel heaters, installed on PWC engines, with redesigned fuel heaters. This amendment is prompted by several field incidents in which one or more of the three studs that attach the fuel filter bowl to the fuel heater have been partially or completely pulled free of the fuel heater housing. We are issuing this AD 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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
