COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes AD/CL-600/3 Passenger Door Interior and Exterior Handles and Latch Mechanism - Inspection and Modification Applicability: All models with S/Nos. 1024 to 1075. Document: Canadair Challenger Alert SB No. A600-0203. Compliance: Within 50 hours time in service after 31 March, 1983. 3/83 Background: Passenger door latch mechanisms and associated fittings have been found incorrectly rigged.