COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Propellers - Variable Pitch - McCauley AD/PMC/28 Propeller Hub - Replacement 10/75 Applicability: Models D2AF34C52/80GF-0 and D2AF34C52A/ 80GF-0 with S/Nos. 63000 to 659999 which have not been modified in accordance with AD/PMC/20. Document: McCauley SB No. 111. Compliance: For propellers which have completed 1500 hours total time in service as at 28 November 1975 - within 100 hours time in service after 28 November 1975. For propellers with less than 1500 hours total time in service -before achieving 1600 hours total time in service.