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/18 Hub and Driving Centre Assembly - Inspection NK of Cadmium Plating Applicability: Models R193/4-30-4/50 and R193/4-30-4/61 with S/Nos. as listed in the requirement document. Document: Dowty Rotol SB No. 61-882. Compliance: As detailed in the requirement document.