COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Propellers - Variable Pitch - McCauley AD/PMC/22 Counterweight Attachment - Modification 10/71 Applicability: Models 2AF36C39, D2AF36C48, D2AF34C52, 2AF34C55 and 2AF36C89. Document: 1. McCauley SB No. 93 and Revisions 93-1 and 93-2; or 2. FAA AD 71-18-2. Compliance: Before installation on an aircraft following next reconditioning completed after 31 December 1971.