Airworthiness Directives 2004
I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety
Authority, acting under subregulation 39.001 (1) of the Civil
Aviation Safety Regulations 1998:
(a) revoke the Airworthiness Directives mentioned in
Schedule 1; and
(b) make, as separate instruments, each Airworthiness
Directive mentioned in Schedule 1 and attached.
David Villiers
Delegate of the Civil Aviation Safety Authority
20 December 2004
Note: Each attached Airworthiness Directive is being re-made in exactly the
same form as appears in the latest published edition of the Directive.
Schedule 1 Revocation and Remaking of
Airworthiness Directives
AlliedSignal (Lycoming) Turbine Engines - T53 Series
AD Name AD Number
Rotating Components - Service Life Limit - CANCELLED AD/T53/1 Amdt 2
First Stage Power Turbine Rotor Blade Retaining Pins Retirement Life AD/T53/2
Rotating Component - Service Life Limits - CANCELLED AD/T53/3 Amdt 1
Engine Oil Pump Drive Gear Spline - Inspection AD/T53/4
Accessory Drive Gearbox - Rework AD/T53/5
Overspeed Pickup Gear and Shaft - Inspection and Modification AD/T53/6
Improved Gas Producer Turbine Rotor Blades - Introduction AD/T53/7
Second Stage Power Turbine Rotor Disc - Rework AD/T53/8
Second Stage Gas Producer Cylinder Bolts - Replacement AD/T53/9
Inlet Guide Vane Feedback Tube Assembly - Inspection AD/T53/10
Replacement Of Compressor Rotor Discs and Impeller Assembly AD/T53/11
Fuel Regulator Main Pressure Regulator Valve Diaphragm Replacement AD/T53/12
Improved Centrifugal Compressor Impeller - Introduction AD/T53/13
Torque Meter Boost Pump - Replacement AD/T53/14
Fuel Regulator - P1 Multiplier Connector Assembly Damping AD/T53/15
Power Turbine Clamping Plate - Inspection AD/T53/16
Centrifugal Compressor Impellers AD/T53/17
Gas Producer and Power Turbine Discs and Spacers AD/T53/18
N2 Accessory Drive AD/T53/19
Accessory Drive Carrier AD/T53/20
Tachometer Drive Spur Gear AD/T53/21