COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DHC-3 (Otter) Series Aeroplanes AD/DHC-3/12 Flap Hydraulic Jack NK Applicability: All models with S/Nos 1 to 201. Requirement: Action in accordance with De H Canada EB "O" No 38. Note: Canadian AD 57-8 refers. Compliance: Forthwith.