COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Propellers - Variable Pitch - Dowty Rotol AD/PR/22 Pitch Lock Cylinder and Support NK Sleeves - Inspection Applicability: All propeller models R179/4-30-4/33, R184/4-30-4/50, R193/4-30-4/50 and /61, R209/4-40-4.5/2, R245/4-40-4.5/13, R257/4-30-4/60, R259/4-40-4.5/17, modified in accordance with Mod. No. (c) VP 2833 (SB 61-838). Requirement: IAW Dowty Rotol SB No. 61-906, Rev. 1. Compliance: Before installation in an aircraft following next reconditioning completed after 31 January 1979.