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/27 Crankcase Breather Aerobatic Oil Trap - Removal 11/66 Applicability: Victa Airtourer 100 fitted with Mod. No. B199. Document: Victa SB No. 63. Compliance: Within 50 hours time in service, after 6 December 1966.