Commonwealth legislation

AD/PA-25/31 - Rapid Throttle Movement - Warning Placard

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This Airworthiness Directive required owners of certain Piper PA-25 Pawnee aircraft (with Lycoming O-320 engines and Marvel Schebler MA-4SPA carburettors) to install a cockpit warning placard per Piper Service Letter No. 644. The placard cautions against rapid throttle movement, which in this configuration can cause carburettor icing, engine power loss, or stoppage—critical for safe agricultural operations. The directive’s compliance deadline was 10 flight hours after 28 November 1972.

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Direct links to the current provisions in AD/PA-25/31 - Rapid Throttle Movement - Warning Placard.

AD/PA-25/31 - Rapid Throttle Movement - Warning Placard

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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 Piper PA-25 (Pawnee) Series Aeroplanes

AD/PA-25/31 Rapid Throttle Movement - Warning Placard 5/73

Applicability: Model PA-25 fitted with Lyc. 0-320 engines equipped with Marvel Schebler carburettor model MA-4SPA, P/No. I0-3678-32.

Document: Piper SL No. 644.

Compliance: Within 10 hours time in service after 28 November 1972.

Source text

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