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-3/14 Tailplane Fork Attachment Fitting NK Applicability: All models with S/Nos 2 to 253. Requirement: Action in accordance with De H Canada EB "O" No 47 Issue 2. Note: Canadian AD 58-4 refers. Compliance: Forthwith.