Commonwealth legislation

AD/TPE 331/6 - Anti-Icing Shield - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

1/10 complexity

This is a mandatory safety order (called an Airworthiness Directive) that requires immediate action from aircraft owners and operators.

What it requires If you operate an aircraft with AlliedSignal TPE-331 turboprop engines (specifically models -25A, -25D, or -25F), you must modify the anti-icing shield — a component that prevents ice from building up on the engine intake.

How to comply Carry out the modification exactly as described in the manufacturer's Service Bulletin No. 10 (or follow alternative directive AD/AIR-T/3). This must be done immediately (the legal term used is "forthwith," meaning without delay).

Why it matters Ice buildup can choke the engine or damage internal components, potentially causing engine failure during flight. This directive ensures a specific safety fix is applied to prevent that risk.

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Current sections

Direct links to the current provisions in AD/TPE 331/6 - Anti-Icing Shield - Modification.

AD/TPE 331/6 - Anti-Icing Shield - Modification

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series

AD/TPE 331/6 Anti-Icing Shield - Modification 3/86

Applicability: TPE-331-25A, -25D and -25F engines. Document: AiResearch TPE-331 SB No. 10; or

AD/AIR-T/3.

Compliance: Forthwith.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.