COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 180, 182 and Wren 460 Series Aeroplanes AD/CESSNA 180/45 Induction Air Box Seal 6/77 Applicability: Model 180 with S/Nos. 18050662 to 18052711. Model 182 and Wren 460 with S/Nos. 18251557 to 18264790. Requirement: Action in accordance with Cessna SL No. SE76-18. Note: FAA AD 77-04-05 Amendment 39-2838 refers. Compliance: Within 100 hours time in service after 30 June 1977.