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-3/15 Engine Driven Fuel Pump NK Applicability: All models fitted with Thompson TFD-900-3 or TFD900-1 fuel pumps. Requirement: Action in accordance with De H Canada EB "O" No 52. Note: Canadian AD 58-11 refers. Compliance: Forthwith.