Commonwealth legislation

AD/ELECT/47 - Propeller De-Ice Terminal Clamp Assembly

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

What this does: This is a mandatory safety notice (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority. It requires aircraft owners and operators to inspect a specific electrical component on certain propellers for dangerous cracks.

Who it affects: Anyone operating aircraft fitted with Hartzell HC-B3TN or HC-B4TN series propellers that have a B.F. Goodrich de-icer terminal clamp (part number 3E1883-2) installed.

What must be done: The terminal clamp assembly must be inspected for cracks following the procedures in B.F. Goodrich Service Bulletin E-85-71. This inspection must be completed before the aircraft's next maintenance release (a safety certificate issued after maintenance work) is issued after 31 January 1986.

Why it matters: If mechanics over-tighten the clamp during maintenance, it can develop cracks around the bolt holes. If the clamp completely breaks, it can separate from the propeller and strike the aircraft fuselage, potentially causing structural damage or injury.

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AD/ELECT/47 - Propeller De-Ice Terminal Clamp Assembly

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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 Electrical Equipment

AD/ELECT/47 Propeller De-Ice Terminal Clamp Assembly 1/86

Applicability: B.F. Goodrich propeller de-icer terminal clamp assembly P/No 3E1883-2 fitted to Hartzell HC-B3TN and HC-B4TN series propellers.

Requirement: Inspect the terminal clamp assembly for cracks according to the requirements of B.F. Goodrich SB No E-85-71.

Compliance: Prior to issue of the next maintenance release after 31 January 1986.

Background: Overstressing of the terminal clamp assembly during maintenance may cause cracking around the attachment holes. Complete failure may lead to the separation of the terminal clamp assembly from the propeller with the possibility of striking the aircraft fuselage.

Source text

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