Airworthiness Directive · Amendment 39-11486 · Boeing Model 767-200, -300, and -300F Series Airplanes
Boeing Model 767-200, -300, and -300F Series Airplanes
Model 767-200, -300, and -300F series airplanes, line numbers 1 through 607 inclusive; equipped with part number S160T300-series carbon brakes; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 767-200, -300, and -300F series airplanes, that requires replacement of the hydraulic reducer fitting in the return port of the alternate brake selector valve with a new restrictor fitting. This amendment is prompted by a report indicating that a brake housing had fractured due to high loads associated with brake vibration during landing gear retraction, which allowed the torque rod to swing free. The actions specified by this AD are intended to prevent failure of the brake housing in the torque rod region, which could reduce the braking capability of the airplane and/or prevent the extension of a main landing gear by any method.
Required as indicated, unless accomplished previously.
To prevent failure of the brake housing in the torque rod region, which could reduce the braking capability of the airplane and/or prevent the extension of a main landing gear, accomplish the following:
Replacement
(a) Within 360 days after the effective date of this AD, replace the hydraulic reducer fitting in the return port of the alternate brake selector valve with a new restrictor fitting, in accordance with Boeing Service Bulletin 767-32-0152, dated June 6, 1996; Revision 1, dated June 27, 1996; or Revision 2, dated July 10, 1997.
