COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes AD/PA-30/13 Amdt 1 Pitch Trim Switch - Replacement 2/77 Applicability: Model PA-30 with S/Nos. 30-1717 and 30-1745 to 30-2000 and all model PA-39 with S/Nos. 39-1 to 39-155 fitted with rocker type switch on pilot's control wheel. Document: 1. Piper SB No. 527; or FAA AD 77-09-10. Compliance: Within 100 hours time in service after 28 February 1977. Note: Aircraft complying with previous issues of this Directive, satisfy this issue of the Directive.