AD 2006-25-10 Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 and 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 the airplanes specified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category, having lift spoiler jacks with part number (P/N) P308-45-0002, P308-45-0102, or P308-45-0202. (1) All BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A series airplanes. (2) All Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Calculating the Life Limit (f) Within 18 months after the effective date of this AD: Calculate the current life of each lift spoiler jack in accordance with the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin ISB.27-178, dated January 14, 2005. Note 1: BAE Systems (Operations) Limited Modification Service Bulletin ISB.27-178 refers to the service information listed in Table 1 of this AD as additional sources of service information for the actions in paragraphs (f) and (g) of this AD. Table 1.—Additional Sources of Service Information This service document— Is an additional source of service information for— BAE Systems (Operations) Limited Modification Service Bulletin SB.27-179-70675A, dated January 19, 2005 Replacing lift spoiler jacks having P/N P308-45-0002 and -0102. BAE Systems (Operations) Limited Inspection Service Bulletin ISB.05-005, Revision 1, dated June 9, 2005 Calculating the theoretical life when complete utilization records do not exist. Smiths Service Newsletter P308-27-003, dated March 12, 2004 Resolving anomalies with the P/Ns. Replacement (g) Within 18 months after the effective date of this AD or before the accumulation of 55,000 total flight cycles on the lift spoiler jack, whichever occurs later: Replace each P/N P308-45-0002, P308-45-0102, or P308-45-0202 lift spoiler jack with a serviceable unit, in accordance with the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin ISB.27-178, dated January 14, 2005. Thereafter, replace each lift spoiler jack with a serviceable unit at intervals not to exceed 55,000 flight cycles. 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) European Aviation Safety Agency airworthiness directive 2006-0138, dated May 23, 2006, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use BAE Systems (Operations) Limited Modification Service Bulletin ISB.27-178, dated January 14, 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 December 1, 2006. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6-20952 Filed 12-11-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from a review of all system components as part of the life-extension program for the affected airplanes that indicated the fatigue life of certain lift spoiler jacks cannot be extended from the current life limit. We are issuing this AD to prevent failure of the lift spoiler jack, and consequent increased drag and uncommanded roll inputs, which could reduce the flightcrew's ability to control the airplane.