COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-30 Series Aeroplanes AD/SD3-30/33 Elevator and Rudder Skin Flukes 7/97 Applicability: All SD3-30 aircraft. Requirement: Inspect in accordance with Shorts Mandatory Service Bulletin SD330-55-19. Note: UK CAA AD 006-02-97 refers. Compliance: Unless already accomplished, before 19 September 1997. This airworthiness directive becomes effective on 19 June 1997. Background: The manufacturer has determined that a low standard of skin may be installed on some empennage control surfaces.