COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes AD/DHC-8/25 Power Cable Connectors 1/93 TX Applicability: All DHC-8 100 & 300 Series without modification 8/1970 incorporated. Requirement: Action in accordance with de Havilland Inc Service Bulletin No A8-24-44 dated 23 October 1992, or later approved versions. Note: Canadian Emergency AD CF-92-20 refers. Compliance: Prior to 9 January 1993. Background: This action is required because electrical DC feeder cables are loosening and corroding. The cause is attributed to the use of aluminium washers.