COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace BAe 146 Series Aeroplanes AD/BAe 146/26 Parking Brake 3/91 Applicability: Model 146 with Constructor's numbers listed in BAe SB 32-104-01159A. Requirement: Action in accordance with BAe Mandatory SB 32-104-01159A. Compliance: As specified in the Requirement Document. Background: This Directive is raised to introduce a modification that installs a special washer in the park brake selector assembly. This prevents the cable tensioning spring in the selector assembly from inadvertently selecting the park brake.