COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Piper PA-25 (Pawnee) Series Aeroplanes
AD/PA-25/14 Fire Protection - Modification - Relocation
of Primer Line
Applicability: Model PA-25-235 and variants of that model.
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Requirement: All Piper PA-25-235 aircraft fitted with the standard cockpit heating installation are to be modified by re-routing the fuel primer line from fuel filter to primer pump, P/N 64179-04, to divert this line from the area immediately behind the engine exhaust heat exchange (muffler). Figure 1 illustrates an acceptable means of compliance.
Alternatively, or in addition, replace the existing copper line by a steel line.
Compliance: Before 1 September 1971.