COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Propellers - Fixed Pitch AD/PFP/9 Amdt 1 Propeller Mounting Bolts - Inspection NK and Torque Check Applicability: All McCauley and Sensenich fixed pitch metal propellers. Requirement: 1. Inspect propeller mounting bolts by magnetic particle method whenever the propeller is removed from the engine for reconditioning or repair. 2. The propeller mounting bolt torque shall be checked at intervals not exceeding 500 hours time in service. Compliance: As above.