Airworthiness Directive · Amendment 39-14596 · BAE Systems (Operations) Limited Model BAe 146 Airplanes and Model Avro 146-RJ Airplanes
BAE Systems (Operations) Limited Model BAe 146 Airplanes and Model Avro 146-RJ Airplanes
This AD applies to all 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.
The FAA is adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited Model BAe 146 airplanes and Model Avro 146-RJ airplanes. This AD requires repetitive replacement of the elevator servo tab hinge bearings, elevator servo tab mechanism bearings, elevator trim tab hinge bearings, and elevator trim tab drive rod bearings with new bearings. This AD results from reported incidents of flight control surface restrictions due to the deterioration of flight control surface bearings. We are issuing this AD to prevent corrosion of flight control surface bearings and freezing of moisture inside the bearings, due to loss of lubrication in the bearings, which could lead to flight control restrictions and result in 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.
Before the accumulation of 96 months on a bearing since new, or within 16 months after the effective date of this AD, whichever is later: Replace the elevator servo tab hinge bearings, the elevator servo tab mechanism bearings, elevator trim tab hinge bearings, and elevator trim tab drive rod bearings with new bearings, in accordance with Part 1 of the Accomplishment Instructions of BAE Systems (Operations) Limited Inspection Service Bulletin ISB.27-177, Revision 1, dated October 5, 2005. Repeat the replacements thereafter at intervals not to exceed 96 months.
Actions done before the effective date of this AD in accordance with BAE Systems (Operations) Limited Inspection Service Bulletin ISB.27-177, dated June 3, 2004, are acceptable for compliance with the requirements of paragraph (f) of 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.
