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/25 Nose Wheel Steering - Inspection 11/65 Applicability: Victa Airtourer 100 and 115 prior to S/Nos. 108 not incorporating Mod. No. B209. Document: Victa SB No. 49, Issue 2. Compliance: At intervals not exceeding 100 hours time in service.