AD/TFE 731/36 - Interstage Turbine Transition Duct (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series AD/TFE 731/36 Interstage Turbine Transition Duct 13/2008

Applicability: Honeywell International Inc. TFE731-4, -4R, -5, -5AR, -5BR, and -5R series turbofan engines, with interstage turbine transition (ITT) duct, part number (P/N) 3075292-1, 3075292-3, 3074766-1, 3077063-1, 3075655-1, 3075655-2, 3075699-1, or 3075699-3, installed.

Note 1: These engines are installed on, but not limited to, Avions Marcel Dassault Mystere-Falcon 50 series, Dassault-Aviation 20, 50, 900, MF900 series, Cessna Model 650, Cessna Citation VII, and Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850XP series aeroplanes. Requirement: 1. Replace the affected ITT ducts listed by part number in the applicability section of this AD, with a serviceable and redesigned ITT duct.

2. Do not install any ITT duct listed by P/N in paragraph (c) of this AD, onto any engine.

Definitions

For the purpose of this AD, a serviceable and redesigned ITT duct is one not having a part number listed in this AD.