Commonwealth legislation

AD/PHZL/39 Amdt 1 - Propeller Damper - Replacement

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 is a mandatory Airworthiness Directive (a legally binding safety order) issued by the Civil Aviation Safety Authority. It requires aircraft owners and maintenance engineers to replace specific damper assemblies in certain Hartzell propellers.

Who it affects: Anyone operating or maintaining aircraft fitted with these specific Hartzell propeller models:

HC-C2YK-2CG( )/( )C7666A-2
HC-C2YK-2CLG( )/( )JC7666A-2

Only applies if the propeller has a C-1576 damper assembly installed.

What you must do: Replace the C-1576 damper assembly with a new or reconditioned assembly before installing the propeller on any aircraft. This applies every time the propeller is reconditioned (overhauled/repaired) after 30 April 1976.

Why it matters: Damper assemblies reduce vibrations in variable-pitch propellers. This directive prevents potential failure of these components, which could damage the propeller or engine and compromise flight safety. Technicians should also consult Hartzell Service Bulletin 110A for technical guidance.

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Current sections

Direct links to the current provisions in AD/PHZL/39 Amdt 1 - Propeller Damper - Replacement.

AD/PHZL/39 Amdt 1 - Propeller Damper - Replacement

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Propellers - Variable Pitch - Hartzell

AD/PHZL/39

Amdt 1

Propeller Damper - Replacement 4/76

Applicability: All HC-C2YK-2CG( )/( )C7666A-2 and HC-C2YK-2CLG( )/( ) JC7666A-2

propellers fitted with C-1576 damper assemblies.

Requirement: Replace the C-1576 damper assembly with a new or reconditioned assembly.

Note: Hartzell SB 110A refers.

Compliance: Before installation on an aircraft following each reconditioning completed after 30 April 1976.

Source text

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