Document ID: chunk:federal_register_of_legislation:F2007L01773:body:0:p1
Version: federal_register_of_legislation:F2007L01773
Segment Type: other
Provision Reference: 
Character Range: 0–3141

AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CL-600/41 and issues the following 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-600/41 Amdt 1  Fire Warning Control Unit  8/2007 DM

Applicability:  CL-600-2B19 Regional Jet (RJ) aircraft, serial numbers 7003 through 7067 inclusive, and 7069 through 7545 inclusive.
Requirement:       1. If not previously accomplished in accordance with the original issue of this Directive, install protective tape on the fire and overheat control unit, part number (P/N) 472597-01, in accordance with Bombardier Alert Service Bulletin (ASB) A601R-26-17 Revision A, dated 8 September 2000 or ASB
                   A601R-26-017 Revision B, dated 6 February 2003.
                   2. Inspect the condition of the protective tape on the fire and overheat control unit P/N 472597-01 to ensure that the tape makes a satisfactory seal to prevent entry of liquid at the fasteners and the hinge of the unit, in accordance with ASB A601R-26-017 Revision B.  If the seal is not in satisfactory condition, remove damaged tape and install new protective tape in accordance with ASB
                   A601R-26-017 Revision B.
                   3. Repeat the Requirement 2 inspection and, if the seal is not in satisfactory condition, remove damaged tape and install new protective tape in accordance with ASB A601R-26-017 Revision B.
                   4. Remove the fire and overheat control unit, P/N 472597-01, and replace it with fire and overheat control unit, P/N 472597-02, in accordance with Bombardier Service Bulletin (SB) 601R-26-018, dated 2 December 2002, or SB 601R 26-018 Revision A, dated 27 February 2003.
                Installation of fire and overheat control unit, P/N 472597-02, in accordance with Requirement 4 constitutes terminating action for this Directive.
                Later revisions of the service bulletins referenced in Requirements 1 through 4 may be utilised for compliance with this Amendment if they are approved by the Chief, Continuing Airworthiness, Aircraft Certification, Transport Canada.
                Note:  Transport Canada AD CF-2000-35-R1 refers.
Compliance:     For Requirement 1 - Within 250 hours time in service (TIS) or 30 days after the effective date of this Amendment, whichever occurs first.

             For Requirement 2 - Within 5,000 hours TIS or at the next "C" check after compliance with Requirement 1 of this Amendment, whichever occurs later.
             For