Commonwealth legislation

AD/CESSNA 336/4 - Open Wire Aerial Installation - Modification

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 is a safety directive for owners of Cessna 336 aircraft. It orders them to fix a dangerous design flaw where radio antenna (aerial) wires are pulling sideways on weak plastic (bakelite) mounting masts, which can cause them to snap in flight.

What owners must do:

Option 1: Re-rig (reposition) the aerial wires so they don't pull sideways on the mast; OR
Option 2: Replace the weak plastic mast with a stronger metal one (the document notes that Rex Aviation masts part numbers RA-483 with brackets RA-482-A or RA-482-B are suitable).

Who it affects: All Cessna 336 models fitted with the specific bakelite aerial stand-off mast (Part Number 0411217) where the aerials apply a side load.

When it had to be done: Within 300 hours of flying time after 15 August 1969.

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AD/CESSNA 336/4 - Open Wire Aerial Installation - Modification

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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 Cessna 336 Series Aeroplanes

AD/CESSNA 336/4 Open Wire Aerial Installation - Modification

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Applicability: All models fitted with bakelite aerial stand off mast Cessna P/N 0411217 which have aerials rigged in a manner which applies a side load to the mast.

Requirement: Re-rig aerials to remove any side load from the mast or replace mast with one of a type suitable for the loads applied.

Note: Rex Aviation mast, comprising rod P/No. RA-483 and bracket P/No. RA-482-A or RA-482-B is a suitable replacement.

Compliance: Within 300 hours time in service after 15 August 1969.

Source text

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