Airworthiness Directive · Amendment 39-14549 · BAE Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ Airplanes
BAE Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ Airplanes
This AD applies to BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A series airplanes, and Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes; certificated in any category; as identified in BAE Systems (Operations) Limited Modification Service Bulletin SB.25-459-36241A, Revision 1, dated March 30, 2005.
The FAA is adopting a new airworthiness directive (AD) for certain BAE Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ airplanes. This AD requires modifying the control cable duct on the left bulkhead structure at frame 12, and, for certain airplanes, the forward toilet bulkhead structure. This AD results from a structural analysis by the manufacturer that revealed that rapid decompression of the flight compartment with the door closed could cause structural deformation of the left bulkhead structure at frame 12, and of the attached cable duct structure. The duct structure protects the cables for the primary flight controls. We are issuing this AD to prevent deformation of the cable duct structure in the event of a rapid decompression, which could result in restriction of the primary flight controls and consequent reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 9 months after the effective date of this AD: Do the actions specified in either paragraph (f)(1) or (f)(2) of this AD by doing all the applicable actions specified in the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.25-459-36241A, Revision 1, dated March 30, 2005.
(1) For airplanes on which BAE Modification HCM50303C has been installed, but on which BAE Modification HCM30033E, HCM30033F, HCM30033G, or HCM30033N has not been installed: Modify the control cable duct on the left bulkhead structure at frame 12 in accordance with Part 1 of the Accomplishment Instructions of the service bulletin.
(2) For airplanes on which BAE Modification HCM50303C has been installed, and on which BAE Modification HCM30033E, HCM30033F, HCM30033G, or HCM30033N has also been installed: Modify the control cable duct on the left bulkhead structure at frame 12 and the forward toilet bulkhead structure in accordance with Parts 1 and 2 of the Accomplishment Instructions of the service bulletin.
Modifications accomplished before the effective date of this AD in accordance with BAE Systems (Operations) Limited Modification Service Bulletin SB.25-459-36241A, dated July 22, 2004, are considered acceptable for compliance with the corresponding action specified in this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
