COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes AD/TB20/3 Elevator/Elevator Tab Control Attachment Inspection and Modification Applicability: All models TB20 with S/Nos up to and including 479. Requirement: Socata TB SB No. 24 Modification No. 48. Compliance: Operation 1: before further flight after 22 February 1985. Operation 2: within 100 hours time in service after 22 February 1985. Background: Socata warns of the risk of play in the tab rod/lever attachment. 4/85 TX