COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Victa and A.E.S.L. Airtourer Series Aeroplanes AD/VAT/10 Amdt 6 Landing Gear Attachment Bolts - Replacement 11/74 Applicability: Airtourer 100, 115 and 150 series. Airtourer T6 Series. Requirement: 1. For Airtourer 100, 115 and 150 series aeroplanes replace special bolts as per Aerospace SB No. 031. 2. For Airtourer T6 series aeroplanes replace special bolts as per Aerospace SB No. 032. 3. Alternatively, replace time expired special bolts in Paras. 1 and 2 with AN steel bolts of equivalent length and diameter. Compliance: For Paras. 1 and 2 - At intervals not exceeding 350 hours time in service. For Para. 3 - At intervals not exceeding 100 hours time in service.