COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DH114 (Heron) Series Aeroplanes AD/DH114/27 Amdt 1 Flap Datum Hinge Assembly - Inspection NK Applicability: All models. Document: Hawker Siddeley TNS Heron (114) No. CF.14, Issue 1. Compliance: For Para. 4.1 - Within 25 hours time in service after 17 July 1970. For Paras. 4.2 & 4.3 - In accordance with the requirement document.