Commonwealth legislation

AD/DHE/3 - Propeller Oil Transfer System - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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 it is: This is an Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority.

What it requires: Before anyone installs a Gipsy Queen 70 series aircraft engine, the propeller oil transfer system must be modified according to specific De Havilland engineering instructions (Modifications G1331, G1493, and G1728) or an approved alternative standard (ANO 106.1.7.6.5.2).

Who it affects: Aircraft maintenance engineers, repair stations, and operators who handle these vintage piston engines.

Why it matters: The modification fixes a safety issue with the propeller oil transfer system. Without it, the propeller might not receive proper oil pressure, potentially causing engine failure or loss of propeller control during flight.

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AD/DHE/3 - Propeller Oil Transfer System - 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/3 Propeller Oil Transfer System - Modification NK

Applicability: Gipsy Queen 70 series.

Document: 1. DH Mods G1331, G1493 and G1728; or 2. ANO 106.1.7.6.5.2.

Compliance: Before installation in an aircraft.

Source text

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