COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 185 Series Aeroplanes AD/CESSNA 185/25 Induction Air Box Seal 6/77 Applicability: Model 185 with S/Nos. 18500001 to 18501832. Requirement: Action in accordance with Cessna SL No. SE76-18. Note: FAA AD 77-04-05 Amendment 39-2838. Compliance: Within 100 hours time in service after 30 June 1977.