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
Allison Turbine Engines - 250 Series
AD Name AD Number
Life Limited Components - CANCELLED AD/AL 250/1 Amdt 12
Compressor Front Bearing Thrust Washer and Spring - Replacement AD/AL 250/2
Oil Filter By-Pass Valve Poppet Guide - Replacement AD/AL 250/3
Sixth Stage Compressor Blades - Modification AD/AL 250/4
Engine Compressor - Modifications AD/AL 250/5 Amdt 1
Power Turbine Governor - Modification AD/AL 250/6 Amdt 1
CANCELLED AD/AL 250/7
Helical Power Train Drive Gear Internal Spline Inspection AD/AL 250/8 Amdt 1
Engine Operating Restrictions to Reduce Torque-Meter Shaftgears Stress AD/AL 250/9
CANCELLED AD/AL 250/10
Engine Improvement - Introduction of Blue Ribbon Modifications AD/AL 250/11 Amdt 3
Pc Filter Flanged Insert - Inspection AD/AL 250/12 Amdt 2
Improved Indicating Magnetic Drain Plugs - Introduction AD/AL 250/13
Compressor Wheels, Glass Bead Peening AD/AL 250/14
Engine Parts - Time Limitations - CANCELLED AD/AL 250/15 Amdt 9
Ceco Fuel Control and Governor External Plug and Lever - Replacement AD/AL 250/16
Life Limited Components - CANCELLED AD/AL 250/17 Amdt 5
Compressor Bleed Valve Orifice - Installation AD/AL 250/18
Fuel System - Power Turbine Governor to Control Fuel Tube Clamp - Installation AD/AL 250/19
Fuel Pump Drive Shaft - Inspection AD/AL 250/20 Amdt 1
Ceco F.C.U. Throttle Shaft and Governor Quadrant and Shaft Assembly - AD/AL 250/21
CANCELLED AD/AL 250/22
Engine Parts - Time Limitations - CANCELLED AD/AL 250/23 Amdt 3
Life Limited Components - CANCELLED AD/AL 250/24 Amdt 5
Power Turbine Outer Coupling Nut - Inspection AD/AL 250/25 Amdt 1
Third Stage Turbine Wheel Replacement - CANCELLED AD/AL 250/26 Amdt 1
Compressor Bleed Valve Strainer - Installation AD/AL 250/27
N1 and N2 Operating Restrictions and Placard Installation - CANCELLED AD/AL 250/28 Amdt 1
CANCELLED AD/AL 250/29 Amdt 1
Fuel System - Fuel Pump to Control and Fuel Control to Pump By-Pass Tube AD/AL 250/30
Fuel System - Check Valve Assembly - Installation AD/AL 250/31
Engine Fuel and Control, Electrical Harness - Replacement AD/AL 250/32
Fourth Stage Compressor Wheel - Retirement AD/AL 250/33
N2 Overspeed Protection: De-Activation and Replacement - CANCELLED AD/AL 250/34
Life Limited Components - CANCELLED AD/AL 250/35 Amdt 2
Life Limited Components - CANCELLED AD/AL 250/36 Amdt 4
Third Stage Turbine Wheel - Replacement AD/AL 250/37
Idler Gearshafts - Replacement AD/AL 250/38
Cancelled AD/AL 250/39
Third Stage Turbine Wheel - Overheat and Replacement - CANCELLED AD/AL 250/40 Amdt 1
Third Stage Turbine Wheel - Inspection and RPM Operational Restrictions AD/AL 250/41 Amdt 5
CANCELLED AD/AL 250/42
Second Stage Turbine Nozzle AD/AL 250/43 Amdt 3
Turbine Support and Exhaust Collector Flow Divider Cracking - CANCELLED AD/AL 250/44 Amdt 1
Power Turbine Inner and Outer Coupling Shaft - Replacement AD/AL 250/45
Power Turbine Governor (Bendix) - Inspection of Drive Shaft AD/AL 250/46 Amdt 1
First Stage Turbine Wheel P/N 6853306 - Replacement AD/AL 250/47
Fourth Stage Turbine Nozzle P/N 6898694 - Inspection AD/AL 250/48 Amdt 3
N2 Overspeed Control System - Disarming AD/AL 250/49
N2 Overspeed Control Assembly - Addition of Lockwashers to Ground Jumper AD/AL 250/50 Amdt 1
High Pressure Fuel Control Filter Assembly - Modification AD/AL 250/51 Amdt 1
Engine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine AD/AL 250/52 Amdt 1
Compressor Mount Assembly AD/AL 250/53 Amdt 1
Engine Turbine Assembly No. 8 Bearing U-Ring Installation AD/AL 250/54 Amdt 1
Gas Producer Rotor Assembly - Tie Bolt P/N 6843388, 6876991 and 6889320 AD/AL 250/55 Amdt 3
Engine Quick Disconnect Magnetic Plugs - Inspection of Lockpins and Slots for AD/AL 250/56 Amdt 1
Turbine Shaft - Inspection - CANCELLED AD/AL 250/57
Gearbox Assembly - PTO Helical Gearshaft Assembly - Replacement AD/AL 250/58 Amdt 2
Outer Combustion Case Assemblies P/N 6899237 and 23009569 AD/AL 250/59 Amdt 3
NI Shafting - Inspection - CANCELLED AD/AL 250/60 Amdt 2
Gas Producer Turbine Assembly and Second Stage Nozzle Seal AD/AL 250/61 Amdt 3
Fourth Stage Nozzle Assembly - Replacement AD/AL 250/62 Amdt 1
Turbine to Compressor Coupling Shaft Inspection and Modifications to Prevent AD/AL 250/63 Amdt 7
Internal Energy Absorbing Ring AD/AL 250/64 Amdt 3
Engine Power and Accessory Gearbox - New Magnetic Plug Introduction AD/AL 250/65
Second Stage Turbine Wheel AD/AL 250/66 Amdt 2
Increased Labyrinth Seal Clearance Second Stage Turbine Nozzle AD/AL 250/67 Amdt 1
Turbine to Compressor Coupling Shaft Inspection and Modifications to Prevent AD/AL 250/68 Amdt 2
Installation of Internal Energy Absorbing Ring AD/AL 250/69
No. 8 Bearing Scavenge Line Air/Oil Separator AD/AL 250/70
Turbine Splined Adapter Locknut Torque AD/AL 250/71
No. 8 Bearing Oil Supply Tube AD/AL 250/72 Amdt 1
Bendix Power Turbine Governor AD/AL 250/73 Amdt 2
Life Limited Components - CANCELLED AD/AL 250/74
Life Limited Components - CANCELLED AD/AL 250/75
Falcon Helicopters AD/AL 250/76
Third Stage Turbine Wheel P/N 23001977 AD/AL 250/77
Superior Turbine Bearings AD/AL 250/78
Fuel Control Bellows Replacement AD/AL 250/79
Gearbox - Torquemeter Gearshaft Assembly AD/AL 250/80 Amdt 1
Third Stage Turbine Wheels AD/AL 250/81
Hydromechanical Unit Power Lever Angle Potentiometer AD/AL 250/82
Third-Stage Turbine Wheels AD/AL 250/83