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/12 Blade Eyebolt and Operating Link NK Group - Inspection and/or Rework Applicability: All 20 root, 30 root and 40 root propellers fitted to RR Dart engined aircraft. Document: Alert SB No. 61-A753 and SB No. 61-754. Compliance: As detailed in the requirement document.