AD/CL-600/123 - Wing Anti-Ice System - Outboard Low-Heat Detection Switches (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes AD/CL-600/123 Wing Anti-Ice System - Outboard 21/2009 Low-Heat Detection Switches

Applicability: Model CL-600-2B19 aeroplanes, Serial Numbers (S/N) 7003 through 8101. Requirement: 1. Amend the Aircraft Flight Manual (AFM), CSP A-012, by inserting Temporary Revision (TR) No RJ/164-2, dated 12 May 2009, or later approved changes to this TR. Advise all flight crews of the changes introduced by the AFM TR. 2. Revise the approved maintenance schedule by incorporating the inspection requirements contained in TR 2A-46, dated 24 July 2009, of the Maintenance Requirements Manual, CSP A-053, Part 2, Appendix A, Certification Maintenance Requirements. 3. Replace the existing Data Concentrator Units (DCU) (Part Numbers (P/N) 622-9820-007 and/or -008 and/or -009) with modified DCUs (P/N 622-9820-010) and also, if applicable, modify the Configuration Strapping Units (CSUs), in accordance with the Accomplishment Instructions in Bombardier Service Bulletin (SB) 601R-31-034, Revision A, dated 10 April 2008, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. Note 1: The modified DCUs have been installed in production on CL-600-2B19 aircraft, serial numbers 8096 and subsequent. Note 2: Accomplishment in accordance with the original issue of Bombardier SB 601R-31-034, dated 19 November 2007, also meets the intent of Requirement 3 of this Directive. 4. Install the outboard low-heat detection switches, wing A/ICE box assembly and associated wires in accordance with the Accomplishment Instructions in Parts A, C, D and E of Bombardier SB 601R-30-031, Revision A, dated 8 September 2009, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. Note 3: Accomplishment of Parts A, C, D and E of Bombardier SB 601R-30-031, Revision A, dated 8 September 2009, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada, may be performed separately from each other.