Commonwealth legislation

AD/DHE/6 - Connecting Rod Securing Nuts - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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 is: A mandatory safety direction (an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) that applies to specific vintage aircraft engines.

What it requires: Before a De Havilland Gipsy Queen Series 70 engine can be installed in any aircraft, the nuts that hold the connecting rods (the metal links connecting pistons to the crankshaft) must be modified according to specific technical instructions.

Who it affects: Aircraft mechanics, maintenance organisations, and owners of aircraft fitted with these engines (commonly used in older British aircraft like the Dove or Devon).

Why it matters: The modification prevents catastrophic engine failure caused by connecting rod nuts loosening during flight. The directive points to three technical documents (DH Modification G1432 Part 1, G1708, or Airworthiness Notice 106.1.7.6.5.9) that detail exactly how the hardware must be altered or replaced.

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Current sections

Direct links to the current provisions in AD/DHE/6 - Connecting Rod Securing Nuts - Modification.

AD/DHE/6 - Connecting Rod Securing Nuts - 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 De Havilland Piston Engines

AD/DHE/6 Connecting Rod Securing Nuts - Modification NK

Applicability: Gipsy Queen Series 70.

Document: 1. DH Mods. G1432 Part 1 or G1708; or 2. ANO 106.1.7.6.5.9.

Compliance: Before installation in an aircraft.

Source text

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