COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Dornier DO-27 Series Aeroplanes AD/DO-27/7 Outboard Elevator Hinge Fitting - Inspection NK Applicability: All models not fitted with Elevator Hinge P/N 27.302- 02H05 "a". Document: Dornier TB No. 27-28B. Compliance: Within 100 hours time in service from 15 April 1969 and thereafter at intervals not exceeding 100 hours time in service.