Airworthiness Directives 2004 - Revocation and Remaking - Allison Turbine Engines - 250 Series

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2006B07722 In force Legislative Instrument

Legislation content

 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

 

Overview

The Airworthiness Directives 2004, promulgated by David Alan Villiers as the delegate of the Civil Aviation Safety Authority, address the need to ensure the safety and airworthiness of aircraft through the revocation and remaking of specific directives concerning Allison Turbine Engines - 250 Series. This legislative instrument was enacted under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998. The primary objective of these directives is to maintain high safety standards in civil aviation by updating and enforcing necessary modifications and inspections on turbine engines to prevent potential hazards. Each directive in Schedule 1 is being re-made in exactly the same form as it appears in the latest published edition, ensuring that the directives remain current and effective. This systematic approach to airworthiness management is critical in maintaining the safety and reliability of aircraft operations in Australia.

Scope and Application

The Airworthiness Directives 2004, made under the Civil Aviation Safety Regulations 1998, applies to all relevant aircraft operators and maintenance entities within Australia. These directives are instrumental in maintaining airworthiness standards for specific turbine engines, notably the Allison 250 Series, ensuring that these engines meet the necessary safety standards to operate in Australian airspace. The directives detail specific requirements and modifications that must be adhered to for certain components and operational restrictions to mitigate risks associated with turbine engine failures or malfunctions. This legislative instrument revokes previous directives and re-issues them to ensure compliance with the latest safety standards. The scope of the Act is national, extending to all aircraft and aviation entities operating within Australia. Subordinate instruments may further define or expand the application of these directives, thereby ensuring that the aviation industry remains compliant with the highest safety standards. There are no stated exclusions or exemptions in this legislation, indicating that all affected entities must comply with the stipulated airworthiness requirements.

Key Provisions

The Airworthiness Directives 2004, made by David Villiers, delegate of the Civil Aviation Safety Authority, primarily concern the revocation and remaking of certain Airworthiness Directives related to Allison Turbine Engines - 250 Series. Specifically, this legislative instrument revokes the existing Airworthiness Directives listed in Schedule 1 and remakes them as separate instruments, ensuring they are presented in the same form as the latest published editions (section 1(a) and (b)). These Airworthiness Directives cover various components and modifications for the turbine engines, such as the replacement, modification, inspection, and retirement of parts like compressor wheels, turbine blades, fuel control systems, and other critical engine parts. The obligations imposed by these Airworthiness Directives are substantial, requiring strict adherence to the outlined procedures and specifications for engine maintenance, modification, and inspection. These obligations apply to aircraft operators, maintenance organisations, and other entities responsible for ensuring the airworthiness of the Allison Turbine Engines - 250 Series. Compliance with these directives is critical to maintaining the safety standards mandated by the Civil Aviation Safety Authority. Failure to comply with the provisions of these Airworthiness Directives can result in significant consequences. The Civil Aviation Safety Regulations 1998, under which these directives are made, provide for potential penalties for non-compliance. Depending on the nature and severity of the breach, consequences can range from fines to more severe penalties, including imprisonment, for serious violations that endanger safety. The exact penalties are detailed within the Civil Aviation Safety Regulations 1998 and can vary based on the specific breach and its impact on aviation safety. The legislative instrument does not specify the maximum penalties within its text but refers to the broader regulatory framework for enforcement.

Legal classification tags

Area of Law
Administrative Law
Instrument
Legislative Instrument
Concepts
Definitions & Interpretation
Enforcement Powers
Regulatory Standards

Interactions

Authorises

All Versions

Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.