COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DH114 (Heron) Series Aeroplanes AD/DH114/7 Engine Mounting Frame - Inspection NK Applicability: All models not modified in accordance with DH Heron Mod. No. 1275. Document: De Havilland TNS Series Heron (114) No. E.1, Issue 2. Compliance: As detailed in requirement document, with effect from 31 Dec. 1960.