COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-24 (Comanche) Series Aeroplanes AD/PA-24/26 Amdt 1 Pitch Trim Switch - Modification 5/71 Applicability: Model PA-24-260 with S/Nos. 24-4783 to 24-5047 fitted with rocker type trim switch on pilot's control wheel. Document: 1. Piper SB No. 527; or 2. FAA AD 77-09-10. Compliance: Within 100 hours time in service after 28 February, 1977.