Commonwealth legislation

AD/DHE/23 - Minimum Modification Standard at Major Reconditioning

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This is a maintenance rule for specific vintage aircraft engines. It mandates safety upgrades when these engines undergo major overhauls.

Who it applies to

Anyone responsible for maintaining or operating aircraft with De Havilland Gipsy Queen 111 or 111A engines.

The requirement

Whenever one of these engines is completely overhauled (major reconditioning) after 30 June 1972, you must incorporate specific design modifications before reinstalling it.

The required modifications are those marked with an asterisk (*) in:

Rolls-Royce Gipsy Technical News Sheet TNS G No. 15 (dated 18 February 1970), and
Appendix 4 to that document (dated 27 June 1963)

Why this matters

Rather than rebuilding these engines to their original factory condition, this rule ensures they are updated with improved design features that enhance safety and reliability.

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Current sections

Direct links to the current provisions in AD/DHE/23 - Minimum Modification Standard at Major Reconditioning.

AD/DHE/23 - Minimum Modification Standard at Major Reconditioning

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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/23 Minimum Modification Standard at Major Reconditioning

Applicability: Gipsy Queen 111 and 111A.

6/72

Requirement: Incorporate modifications marked with an asterisk in Rolls Royce Gipsy Technical News Sheet TNS G No. 15 dated 18 February 1970, Appendix 4 dated 27 June 1963.

Compliance: Before installation following next reconditioning completed after 30 June 1972.

Source text

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