COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters AD/DAUPHIN/40 Main Rotor Shaft 7/94 DM Applicability: All model SA 365 helicopters versions C, C1, C2, C3, N, N1 and N2 equipped with main rotor shaft P/N 365A31-1179-00, -01, -02, -03, -04 or -21 with serial number less than 10000. Requirement: Action in accordance with Eurocopter France Telex Service No 01-31 or 01-39, as applicable. Note: DGAC AD 93-066-037(B)R1 and 93-065-034(B)R1 refer. Compliance: As specified in the Requirement Document. Background: The manufacturer has advised that corrosion has been found on the mast during overhaul.