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/11 Amdt 1 Blade Operating Pin - Inspection for Cracking NK Applicability: As detailed in the requirement document. Document: 1. Dowty Rotol Alert SBs No. 61-A733 (Model (c) R175/4-30-4/13E and No. 61- A740 (Model (c) R193/4-30-4/50 and 61); and 2. Dowty Rotol SB 61-711 Rev. 2 (All 4 bladed Nos. 20, 30 and 40 root size propellers fitted to RR Dart engined aircraft). Compliance: As detailed in the requirement document.