COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F27 Series Aeroplanes AD/F27/102 Fuel Tank Ventilation Hose - Inspection and Replacement Applicability: As detailed in Requirement Document. Document: Fokker SB No. F27/28-55 dated 15 April 1981. Note: RLD AD 81-19-28 dated 15 April 1981 refers. Compliance: Part 1 - Before 1 September 1981. Part 2 - Before 31 March 1982. 6/81 Background: The manufacturer may inadvertently have supplied non-fuel resistant hose material to operators as replacement for the fuel vent system hoses.