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 104/18 Amdt 1 Trim Tab Connecting Rod Eye End 11/91 Applicability: Model DH 104 series. Requirement: Remove the rudder and elevators, and the rudder and elevator trim tab connecting rod assemblies; carry out an inspection for cracking of the eye ends P/N CM-2A and CM-2B. Note: Hawker Siddeley Technical News sheet CT (104) No. 187 issue 1 refers. Compliance: At each check 4 inspection. The compliance time of the previous issue of this Directive was at intervals not exceeding 500 hours time in service. Background: A cracked eye end was found on a Heron aircraft elevator trim tab connecting rod. The same part is fitted to Dove aircraft. This amendment extends compliance to align with Country of Origin AD.