COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-30 Series Aeroplanes AD/SD3-30/30 Fin to Tailplane Attachment Bolts and Upper Shear Angle 7/95 DM Applicability: All models. Requirement: Action in accordance with Shorts Service Bulletin SD330-55-18. Compliance: Within 60 days after 03 May 1995; thereafter at intervals not exceeding 1500 hours time in service. Background: Fin to tailplane attach bolts have been found loose, and rivets in the upper shear angle have been found pulled or loose.