AD/CL-600/97 Amdt 1 - Enhancement to Takeoff Operational Safety Margins (Cth)

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-600/97 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-600/97 Amdt 1 Enhancement to Takeoff Operational Safety Margins 12/2008 DM

Applicability: Bombardier Inc. Model CL-600-2B19 aircraft. Requirement: 1. a. Amend the Aircraft Flight Manual (AFM) by inserting Temporary Revision (TR) RJ/155-5, dated 7 August 2008 or later approved revision; and

b. Insert a copy of this Airworthiness Directive in the AFM; and

c. Advise all flight crews on the changes introduced through the AFM TR.

2. Review the "Pilot's Checklist" to ensure that the instructions regarding selection of the wing anti-ice system to "ON", as specified in the AFM Limitations Section, are incorporated.

Note: Canadian Airworthiness Directive No. CF-2008-15R1 dated 20 August 2008 refers. Compliance: Within 14 days after the effective date of this AD. This Amendment becomes effective on 6 October 2008. Background: Following three recent events where Bombardier CL-600-2B19/CL-600-2B16 aircraft experienced un-commanded roll during take-off, it has been determined that it is necessary to further enhance the AFM limitations and procedures to ensure safe operation, particularly in cold weather or icing conditions.