AD 2005-17-03 Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

This AD applies to Bombardier Model CL-600-2B19 (Regional Jet series 100 & 440) airplanes, certificated in any category, serial numbers 7003 through 7067 inclusive, 7069 through 7165 inclusive, 7167 through 7169 inclusive, and 7171 through 7188 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. Installation of Hydraulic Line Shields (f) Within 24 months after the effective date of this AD, install additional shielding of the hydraulic lines in the wing box area, by doing all the actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 601R-57-021, Revision D, dated July 11, 2005. (g) Installations accomplished before the effective date of this AD according to Bombardier Service Bulletin 601R-57-021, Revision “B,” dated July 18, 2001; or Revision “C,” dated February 23, 2004; are considered acceptable for compliance with the corresponding action specified in this AD. Alternative Methods of Compliance (AMOCs) (h) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Related Information (i) Canadian airworthiness directive CF-2004-20, dated October 5, 2004, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use Bombardier Service Bulletin 601R-57-021, Revision D, dated July 11, 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 Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centreville, 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. Issued in Renton, Washington, on August 10, 2005. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-16264 Filed 8-19-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by the determination that additional shielding of the hydraulic lines in the wing box area will protect the lines from possible impact by tire debris if the tire tread fails. We are issuing this AD to prevent damage to the hydraulic lines and subsequent leakage from the two hydraulic systems, which could result in loss of braking capability on the affected side of the airplane, asymmetrical braking, and reduced directional control—particularly during a rejected takeoff.