COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 767 Series Aeroplanes AD/B767/50 Leading Edge Slat Torque Tube Fittings 2/91 TX Applicability: Model 767 aircraft with line numbers 001 through 340. Requirement: Action in accordance with the technical requirements of FAA Telegraphic AD/T90/26/51. Note: Boeing Alert SB 767-27A0110 dated 13 December 1990 refers. Compliance: As specified in the Requirement document with the effective date 14 December 1990. Background: Country of Origin Telegraphic AD.