Commonwealth legislation

AD/PA-31/39 - Propeller Feather Assist Spring - Installation

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 requires operators of Piper PA‑31P Navajo aircraft fitted with certain Hartzell propellers to install propeller “feather assist” springs to improve feathering in an engine failure. Compliance must follow Piper Service Bulletin No. 470 within 100 hours’ time after 31 December 1975. The directive also references Service Bulletin No. 458 for propeller overspeed emergency procedures.

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AD/PA-31/39 - Propeller Feather Assist Spring - Installation

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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-31 Series Aeroplanes

AD/PA-31/39 Propeller Feather Assist Spring - Installation 12/75

Applicability: All model PA-31P fitted with Hartzell propellers HC-C3YN-2L, HC-C3YN-2LF, HC-C2YN-2LA, or HC-C3YN-2LAF.

Requirement: Install propeller feather assist springs in accordance with Piper SB No. 470.

Note: Operators are advised to refer to Piper SB No. 458, which recommended operational procedures to be observed in the event of a propeller overspeed.

Compliance: Within 100 hours time in service after 31 December 1975.

Source text

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