COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 177 Series Aeroplanes AD/CESSNA 177/19 Air Filter Seal 5/75 Applicability: All models listed in SL SE75-3. Requirement: Action in accordance with Cessna SL SE75-3. Note: FAA AD 75-07-02 refers. Compliance: Within 100 hours time in service after 30 May 1975.