AD/CL-600/97 Enhancement to Takeoff Operational Safety Margins (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-600/97 Enhancement to Takeoff
Operational Safety Margins 5/2008 DM

Applicability:

Bombardier Inc. Model CL-600-2B19 “Regional Jet” aircraft.

Requirement:

1.    a.     Amend the Aircraft Flight Manual (AFM) by inserting Temporary Revision (TR) RJ/155-2, dated 7 March 2008; and

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

2.    a.     Advise all flight crews on the changes introduced through the AFM TR; and,

Note 1:  All existing requirements regarding adherence to a “clean wing” remain in effect; existing inspection, de-icing and anti-icing procedures must continue to be adhered to.

b.    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 2:  Canadian Airworthiness Directive No. CF-2008-15 dated 7 March 2008 refers.

Compliance:

Requirements 1.a. and 1.b.:

Within 21 days after the effective date of this directive.

Requirements 2.a. and 2.b.:

Within 14 days after the effective date of this directive.

This Airworthiness Directive becomes effective on 13 March 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.

This AD mandates the introduction of additional limitations and procedures to the current AFM and requires that any Operators’ Pilot’s checklists fully reflect these procedures.  In order not to compromise the takeoff operational safety margin, strict adherence to all the AFM procedures and limitations is required.

David Villiers
Delegate of the Civil Aviation Safety Authority

11 March 2008