COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes AD/PA-22/31 Fire Hazard Prevention - Inspection and Rework 4/85 DM Applicability: All models. Requirement: Piper SB 161A. Note: FAA AD 57-22-1 refers. Compliance: Within 25 hours time-in-service after 31 March 1985 and thereafter at intervals not exceeding 100 hours. Background: Following an in-flight fire it has been considered necessary to re-issue the requirements of cancelled AD/PA-22/10.