COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AlliedSignal (Lycoming) Turbine Engines - T53 Series
AD/T53/12 Fuel Regulator Main Pressure Regulator Valve
Diaphragm Replacement
1/86
Applicability: All T5307, 09, 11, 13 Series and T53-L-9, -11, -13 Series engines fitted with fuel regulator main pressure regulator valve diaphragms P/N 78958 having a cure date of 1 July 1973 to 30 June 1974 (identified as 3Q73, 4Q73, 1Q74, 2Q74).
Document: 1. Lycoming Alert SB No. 0040; or
2. AD/LYC-T/13. Compliance: Before 30 August 1974.