COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-44 (Seminole) Series Aeroplanes AD/PA-44/5 Engine Priming System - Modification 8/79 Applicability: Model PA-44-180 with S/Nos. 44-7995001 to 44-7995190. Document: 1. Piper SB No. 634; or 2. FAA AD 79-12-11, Amendment 39-3490. Compliance: Within 25 hours time in service after 29 June 1979. Background: The engine fuel primer system of this aircraft is subject to cracking of lines and breakage of fittings and poses a fire hazard.