AD/TFE731/35 - High Pressure Turbine Rotor Discs Curvic Couplings (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 731/35 High Pressure Turbine Rotor 5/2008 Discs Curvic Couplings

Applicability: Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series turbofan engines.

Note 1: These engines are installed on, but not limited to Avions Marcel Dassault Mystere-Falcon 10 and 50 Series, Cessna Model 650, Citations III, VI, and VII, Dassault-Aviation 20, 50, 50EX, 900, MF900, and 900EX (900DX) Series, Gulfstream Aerospace LP (formerly IAI) 1125 Westwind Astra, Astra SPX, Gulfstream 100 Series Israel Aircraft Industries (IAI) 1124 Series (Westwind 1124), Learjet 31, 35, 36, 45 (or Learjet 40), and 55 Series, Lockheed-Georgia 3329-25 Series (731 Jetstar, Jetstar II), Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850 Series Sabreliner NA-265-65 (Sabreliner 65) aeroplanes. Requirement: 1. For TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, and -5R series turbofan engines, remove HP turbine rotor assemblies from service containing HP turbine rotor discs, part number (P/N) 3075772-1, having any serial number (SN) in Table 1 of Honeywell Service Bulletin (SB) No. TFE731-72-3720, dated 5 July 2006.