COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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.