AD 2006-02-04 Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) Airplanes

This AD applies to Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) airplanes, certificated in any category; as identified in Table 1 of this AD. Table 1.—Affected Airplanes by Serial Number Bombardier airplane model Affected serial numbers CL-600-1A11 (CL-600) 1004 through 1085 inclusive. CL-600-2A12 (CL-601) 3001 through 3066 inclusive. CL-600-2B16 (CL-601-3A and CL-601-3R) 5001 through 5194 inclusive. CL-600-2B16 (CL-604) 5301 through 5564 inclusive.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Service Bulletin Reference (f) The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of the applicable service bulletin in Table 2 of this AD. Table 2.—Service Bulletins Bombardier airplane model Bombardier service bulletin CL-600-1A11 (CL-600) 600-0714, including Appendix 1 and excluding Appendix 2, dated April 4, 2003. CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A and CL-601-3R) (601-0549, including Appendix 1 and excluding Appendix 2, dated April 4, 2003. CL-600-2B16 (CL-604) 604-27-013, including Appendix 1 and excluding Appendix 2, dated April 4, 2003. Modification and Rigging (g) Within 12 months after the effective date of this AD: Modify and rig the adjustable rudder balance spring assembly for the rudder control surface, in accordance with the Accomplishment Instructions of the applicable service bulletin specified in Table 2 of this AD. Where the service bulletin specifies contacting Bombardier for instructions on making certain adjustments: Before further flight, adjust according to a method approved by the Manager, New York Aircraft Certification Office (ACO), FAA; or Transport Canada Civil Aviation (TCCA) (or its delegated agent). No Reporting Required (h) Although the service bulletins referenced in this AD specify to submit certain information to the manufacturer, this AD does not include that requirement. Parts Installation (i) After the effective date of this AD, no person may install on any airplane a rudder balance spring assembly unless it has been modified and rigged in accordance with paragraph (g) of this AD. Alternative Methods of Compliance (AMOCs) (j)(1) The Manager, New York ACO, 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 (k) Canadian airworthiness directives CF-2005-21, dated June 23, 2005, and CF-2005-21R1, dated November 23, 2005, also address the subject of this AD. Material Incorporated by Reference (1) You must use the service documents identified in Table 3 of this AD 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 these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, 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. Table 3.—Material Incorporated by Reference Bombardier service bulletin Date 600-0714, including Appendix 1 and excluding Appendix 2 April 4, 2003. 601-0549, including Appendix 1 and excluding Appendix 2 April 4, 2003. 604-27-013, including Appendix 1 and excluding Appendix 2 April 4, 2003. Issued in Renton, Washington, on January 10, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-467 Filed 1-19-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from production inspections that showed that the spring assembly that controls rudder balance may not have the correct pre-load on some airplanes. We are issuing this AD to prevent uncommanded yaw movements and consequent reduced controllability of the airplane.