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/17 Hydraulic System 1/87 DM Applicability: All Model SA360C, SA365C, C1, C2 and C3 helicopters. Requirement: Action in accordance with Aerospatiale SA360 and 365 Service Bulletin No. 29-01. Note: French AD 86-176-27(B) refers. Compliance: Before further flight after 31 December 1986. For spares: before installation in an aircraft after 31 December 1986. Background: A spring spacer is fitted to prevent an overpressure in the hydraulic systems if the flange of the regulator valve stem should come off.