COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series AD/TFE731/7 Amdt 2 Turbine Interstage Transition Duct 11/87 Applicability: TFE 731-2, -3, -3A, -3AR, -3B, -3BR and -3R engines whose serial numbers are detailed in the Requirement document. Requirement: Action in accordance with GTEC SB TFE-731-72-3159R6. Compliance: Unless already accomplished, at the next major periodic inspection or at the next access of affected part whichever occurs first after 30 June 1986. Note: Compliance with the previous issue of this Directive satisfies compliance with this amendment. Background: This Directive is amended to reflect the manufacturers revision 6 of SB TFE 731-72-3159 which updates engine application and includes reference to FAA AD 81-24-08 which addresses this subject.