COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F50 (F27 Mk 50) Series Aeroplanes AD/F50/40 Fire Wire Connector Replacement 2/91 Applicability: All Fokker F27 MK 50 aircraft as listed in the Requirement document. Requirement: In accordance with the technical Requirements of the Netherlands AD BLA 90-127. Note: Fokker SB F50-26-008 also refers. Compliance: As specified in Requirement document with an effective date of 9 November 1990. Background: Advice has been received that the ingress of moisture into the fire wire connectors can cause false fire warnings.