Commonwealth legislation

AD/DHC-1/16 - Tailwheel Yoke Attachment Bolt - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

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What this is: A mandatory safety rule for owners of vintage De Havilland DHC-1 Chipmunk aircraft (a British-designed trainer plane from the 1940s-50s).

What it requires: If your aircraft has Modification H.223 installed, you must regularly inspect the tailwheel yoke attachment bolt — the bolt that holds the tailwheel assembly to the airframe. This inspection must happen every 300 hours of flight time (time in service).

Who it affects: Operators and maintainers of DHC-1 Chipmunk aeroplanes fitted with Mod. H.223. You can check your aircraft's maintenance records to see if this modification applies.

Why it matters: The tailwheel is a critical control surface for ground handling. A failed attachment bolt could cause loss of directional control during takeoff or landing. This rule ensures potential cracks or wear are caught before they cause failure.

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Direct links to the current provisions in AD/DHC-1/16 - Tailwheel Yoke Attachment Bolt - Inspection.

AD/DHC-1/16 - Tailwheel Yoke Attachment Bolt - Inspection

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source De Havilland DHC-1 (Chipmunk) Series Aeroplanes

AD/DHC-1/16 Tailwheel Yoke Attachment Bolt - Inspection 11/66

Applicability: All models incorporating Mod. H.223. Document: Hawker Siddeley TNS Series ST(C1) No. 152.

Compliance: At intervals not exceeding 300 hours time in service.

Source text

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