COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 767 Series Aeroplanes AD/B767/120 Alternate Brake Selector Valve 6/2000 Applicability: Model 767-200, -300 and -300F series aircraft, line number 1 through 607 inclusive, equipped with P/N S160T300-series carbon brakes. Requirement: Replace the hydraulic reducer fitting in the return port of the alternate brake selector valve with a new restrictor fitting in accordance with the original, Revision 1 or 2 of Boeing Service Bulletin 767-32-0152. Note: FAA AD 99-27-05 Amdt 39-11486 refers. Compliance: Unless previously carried out, by 8 February 2001. This Airworthiness Directive becomes effective on 15 June 2000. Background: Advice has been received that a brake housing fractured due to the higher loads associated with brake vibration during landing gear retraction. The action specified in this Directive should prevent a failure of the brake housing.