COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SIAI Marchetti S205 and S208 Series Aeroplanes AD/SM-205/17A Aileron and Flap Control Cables - Inspection and Modification 3/74 Applicability: All models. Document: 1. SIAI Marchetti SB 205B31B; or 2. RAI AD No. 73-176/S205-27, S205-6 Revision 2. Compliance: Within 50 hours time in service after 29 March 1974 and thereafter at intervals not exceeding 50 hours time in service until modified.