COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Dornier DO-27 Series Aeroplanes AD/DO27/12 Horizontal Tail Bearing Fitting Rivets 13/96 DM Applicability: All Series all Serial Numbers. Requirement: Action in accordance with Daimler Benz Aerospace/Dornier SB1140-0000 dated 29 September 1995. Note: LBA AD 96-271 refers. Compliance: Within 30 days after 09 October 1996. Background: Loosening of rivets is possible at the bearing flange, and "L" profile and profile of the frame.