Commonwealth legislation

AD/PA-28/41 - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

1/10 complexity

What this is: A safety directive requiring owners of specific light aircraft to install a warning label in the cockpit.

Who it affects: Owners and operators of Piper PA-28 Cherokee aircraft (models 140, 150, 160 and S-160) powered by Lycoming O-320 engines with Marvel Schebler MA-4SPA carburettors (part number IO-3678-32).

What it requires: You must install a warning placard (a physical sign or sticker) cautioning against rapid throttle movement. This addresses a safety risk where sudden changes to engine power settings could cause engine problems—likely fuel starvation or rough running in these specific carburettor models.

When: The work must be completed within 10 hours of flight time after 28 November 1972. For aircraft still in service, this remains a mandatory part of their maintenance history.

Technical details: The directive references Piper Service Letter No. 644 for the exact wording and placement instructions for the placard.

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Direct links to the current provisions in AD/PA-28/41 - Rapid Throttle Movement - Warning Placard.

AD/PA-28/41 - 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-28 Series Aeroplanes

AD/PA-28/41 Rapid Throttle Movement - Warning Placard 5/73

Applicability: Models PA-28-140, -150, -160 and -S-160 fitted with Lycoming 0-320 engines equipped with Marvel Schebler carburettors model MA-4SPA, P/No. IO-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.