Commonwealth legislation

AD/PA-23/84 - Exhaust System - Inspection and 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

What this does: This directive orders owners and operators of specific Piper Aztec aircraft to install a safety cable on the exhaust system crossover tubes to prevent them from disconnecting.

Who it affects: Owners and operators of Piper PA-23-250 Aztec aircraft (normally aspirated only) with serial numbers between 27-2505 and 27-8054019.

What must be done: If not already done, install a safety cable on the exhaust crossover tube slip-joint connections following the instructions in Piper Service Bulletin 662. This must be completed within 100 hours of flight time after 31 December 1982.

Why it matters: The exhaust crossover tubes have been disconnecting at the slip-joints, causing hot exhaust gases to burn through the engine nose cowling and carburettor heat muff. This creates a fire risk and could damage critical engine systems. The safety cable prevents the joint from separating, eliminating this safety hazard.

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AD/PA-23/84 - Exhaust System - Inspection and 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 Piper PA-23 (Apache and Aztec) Series Aeroplanes

AD/PA-23/84 Exhaust System - Inspection and Modification 11/82

Applicability: PA-23-250 (6 places) Aztec S/Nos. 27-2505 to 27-8054019 (normally aspirated only).

Document: Piper SB 662.

Compliance: If not already accomplished, within 100 hours time in service after 31 December 1982.

Background: Reports have been received of exhaust system crossover tubes disconnecting at the forward slip-joint connections. This condition has led to burning of the engine nose cowling and carburettor heat muff. The fitting of a safety cable to the slip joint as outlined in Piper SB 662 should prevent further occurrences.

Source text

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