Commonwealth legislation

AD/PA-25/19 - Engine Mount - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This CASA Airworthiness Directive requires owners/operators of Piper PA-25 Pawnee series aircraft to routinely inspect the engine mount for cracks—visual checks every 25 flight hours (pilot-performable) and more detailed dye-penetrant inspections every 250 hours by licensed maintenance.

It targets a critical failure mode: undetected mount cracking can lead to engine separation in flight, so the rule prevents catastrophic structural failure.

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AD/PA-25/19 - Engine Mount - Inspection

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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-25/19 Engine Mount - Inspection 11/67

Applicability: Model PA-25 and variants of that model.

Requirement: 1. Inspect the engine mount tubes for cracking particularly in the vicinity of the engine mounting feet.

Inspect the engine mounting brackets at the firewall for cracking.

Compliance: Visually inspect at intervals not exceeding 25 hours time in service and inspect using a dye penetrant technique at intervals not exceeding 250 hours time in service.

Visual inspections may be performed and certified for by the pilot.

Source text

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