COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-60 Series Aeroplanes AD/SD3-60/3 Elevator Tab Linkage - Inspection and Modification 1/84 Applicability: All model SD3-60 aircraft with S/Nos SH 3601 to SH 3623. Requirement: 1. Shorts S.B. SD360-55-A02. 2. Shorts S.B. SD360-55-02 modification 7448. Compliance: 1. Within 60 hours ("A" Check) time in service after 12 December 1983 and thereafter at intervals not exceeding 60 hours ("A" check) until modified. 2. Before 31 March 1984. Background: Analysis shows that in the event of elevator tab disconnect there could be an unacceptable level of vibration.