AD 2008-05-13 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 and 440) airplanes, certificated in any category; serial numbers 7003 through 7990 inclusive, and 8000 through 8070 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. REQUIREMENTS OF AD 2006-17-14 Inspection and Corrective Action (f) Within 800 flight hours or four months after September 7, 2006 (the effective date of AD 2006-17-14), whichever occurs first: Do a general visual inspection of AC bus contactors 1K4XD and 2K4XD, part number (P/N) D-18ZZA, and the bus contactor K4XA, P/N D-7GRZ, to determine which contactors have an Ultem 2200 terminal base plate (i.e., the plate is made from a black molded thermal plastic material), and apply RTV sealant to the terminal base plate, as applicable, by doing all the actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 601R-24-122, Revision A, dated July 13, 2006. Do all applicable applications of sealant before further flight. Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.” Previous Actions Accomplished According to Other Service Information (g) Actions accomplished before September 7, 2006, in accordance with Bombardier Drawing Number K601R50180, dated June 2, 2006; or Bombardier Service Bulletin 601R-24-122, dated June 27, 2006; are considered acceptable for compliance with the actions specified in paragraph (f) of this AD. NEW REQUIREMENTS OF THIS AD Inspection and Corrective Action (h) Within 12 months after the effective date of this AD, do a general visual inspection, re-identification, and corrective actions, as applicable, by doing all the applicable actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 601R-24-123, Revision B, dated February 16, 2007. Do the applicable corrective action before further flight. Accomplishment of these actions constitutes terminating action for the requirements of this AD. Parts Installation (i) As of the effective date of this AD, no person may install any AC contactor 1K4XD, 2K4XD, or K4XA, having a non-G9 melamine terminal base plate, on any airplane. Alternative Methods of Compliance (AMOCs) (j)(1) 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. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Related Information (k) Canadian airworthiness directive CF-2006-17R1, dated May 30, 2007, also addresses the subject of this AD. Material Incorporated by Reference (l) You must use Bombardier Service Bulletin 601R-24-122, Revision A, dated July 13, 2006; and Bombardier Service Bulletin 601R-24-123, Revision B, dated February 16, 2007, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of Bombardier Service Bulletin 601R-24-123, Revision B, dated February 16, 2007, in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (2) On August 9, 2006 (71 FR 45364, August 9, 2006), the Director of the Federal Register approved the incorporation by reference of Bombardier Service Bulletin 601R-24-122, Revision A, dated July 13, 2006. (3) 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 FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html . Issued in Renton, Washington, on February 25, 2008. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E8-3982 Filed 3-3-08; 8:45 am] BILLING CODE 4910-13-P

This AD results from incidents of short circuit failures of certain alternating current (AC) contactors located in the avionics bay. We are issuing this AD to prevent short circuit failures of certain AC contactors, which could result in arcing and consequent smoke or fire.