AD 2006-10-12 Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 Airplanes and Model Avro 146-RJ Airplanes

Models named: BAe 146-100A, -200A, -300A series, Avro 146-RJ70A, 146-RJ85A, 146-RJ100A. Read the applicability below — it usually turns on serial or part numbers too.

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.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Repetitive Replacement (f) 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. Credit for Previous Service Bulletin (g) 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. Alternative Methods of Compliance (AMOCs) (h)(1) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with § 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (i) British airworthiness directive G-2005-0014, dated May 31, 2005, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use BAE Systems (Operations) Limited Inspection Service Bulletin ISB.27-177, Revision 1, dated October 5, 2005, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact British Aerospace Regional Aircraft American Support, 13850 Mclearen Road, Herndon, Virginia 20171, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Issued in Renton, Washington, on May 8, 2006. Ali Bahrami, Manager, , Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-4543 Filed 5-16-06; 8:45 am] BILLING CODE 4910-13-P

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.