COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series AD/TPE 331/24 Propeller Pitch Control Sleeve - Replacement 3/86 Applicability: All TPE-331-1, -2, -3, -5 and -6. series engines. Document: 1. AiResearch SB No. TPE-331-72-0115, Rev. 1;or 2. FAA AD No. 78-05-02, amendment No. 39-3145, or 3. AD/AIR-T/33. Compliance: Before installation in an aircraft after 1 April 1979 or within 500 hours time in service after 30 April 1978 whichever occurs first.