COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F27 Series Aeroplanes AD/F27/100 Main Entrance Door - Check of Emergency Operation Applicability: All models F27 with S/Nos. as listed in RLD AD 79-106-52. Document: 1. RLD AD 79-106-52; or 2. Fokker SB No. F27-52-61. Compliance: Unless already accomplished, before 1 May 1980. 5/80 Background: There is a possibility of malfunction of the emergency operation of the main cabin door.