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 331/44 Pitch Control Gasket 2/93 TX
TPE 331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14, -25, -43, -47A, -55B and -61A engines that have had the propeller pitch control gasket replaced after 10 May 1992.
Action in accordance with Garrett (Allied-Signals) Service Bulletin TPE331-A72- 7092 or TPE331-A72-0857, as applicable.
FAA Priority Letter Airworthiness Directive 92-26-07 refers.
A. For installed engines. Within the next 10 hours time in service from 21 December 1992.
B. For uninstalled engines. Prior to installation in an aircraft.
Several failures of the propeller pitch control gasket have been reported. Failure of the gasket resulted in a sudden loss of engine oil and propeller control. In one incident the failure occurred during the landing run when reverse pitch was applied.