Commonwealth legislation

AD/DH 82/4 - Q Type Harness - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What this does: This is a mandatory safety fix for owners of vintage DH 82 Tiger Moth aircraft. It orders the modification of "Q" type seatbelt harnesses that have a dangerous design flaw—the release lever could accidentally be bumped during flight, causing the harness to unlock unexpectedly (which would be catastrophic at altitude).

Who it affects: Anyone operating a DH 82 Tiger Moth equipped with the "Q" type safety harness.

What must be done:

Modify the harness locking mechanism so the release lever can't be accidentally triggered in flight
The modification design must be pre-approved by the Secretary (of the relevant government department)
Use the specific technical drawing Department of Civil Aviation Drawing HH 3364 (Page 6) as the approved method, or alternatively follow the standard ANO 105.1.14.5.5.4

When: Immediately (the directive uses the term "Forthwith"—meaning no grace period).

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Current sections

Direct links to the current provisions in AD/DH 82/4 - Q Type Harness - Modification.

AD/DH 82/4 - Q Type Harness - Modification

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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 DH 82 (Tiger Moth) Series Aeroplanes

AD/DH 82/4 “Q” Type Harness - Modification NK

Applicability: All models equipped with “Q” type safety harnesses.

Requirement: 1. Modify the harness locking mechanism to prevent the inadvertent operation in flight of the release lever. Designs shall be approved by the Secretary before incorporation.

Approved method of compliance: Department of Civil Aviation Drawing HH 3364

Page 6; or

ANO 105.1.14.5.5.4.

Compliance: Forthwith.

View image in the official source

Source text

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