COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DH114 (Heron) Series Aeroplanes AD/DH114/18 Amdt 1 Wing Spar - Inspection NK Applicability: All models up to S/No. 14094, and S/No. 14098, not incorporating Mod. 843. Document: Hawker Siddeley TNS Heron (114) No. W6, Issue 3. Compliance: As detailed in requirement document with effect from 30 May 1975.