COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DH 104 (Dove) Series Aeroplanes AD/DH 104/12 Amdt 2 Outer Mainplane - Inspection 4/75 Applicability: All models not incorporating Mod. 870. Document: De Havilland TNS CT(104) No. 134, Issue 5. Compliance: As detailed in the requirements document.