EASA SIB 2011-29
Operation of Bombardier CRJ 100/200/440 and Challenger 850 and 600 series aircraft in cold weather or icing conditions during take-off.
Summary
EASA Safety Information Bulletin 2011-29 is an informational document addressing the operation of Bombardier CRJ 100/200/440 and Challenger 850 and 600 series aircraft in cold weather or icing conditions during take-off. It highlights the importance of adhering to Aircraft Flight Manual limitations and procedures, particularly regarding wing anti-ice system use and rotation rates. The bulletin also promotes pilot training initiatives such as Bombardier's Take-Off Safety Enhancement campaign to improve safety during winter operations.
What Changed
This bulletin raises awareness about risks of un-commanded roll due to asymmetric stall caused by wing contamination and high rotation rates during take-off in cold or icing conditions. It references prior Transport Canada Airworthiness Directives that mandated changes to the AFM, Quick Reference Handbooks, and pilot training for the affected Bombardier aircraft. The bulletin reinforces these measures and encourages operators to follow established procedures and training programs.
Why It Matters
The information is critical for aviation professionals to prevent accidents related to asymmetric stalls during take-off in cold weather. Operators, maintenance organizations, and compliance teams must ensure that flight crews understand and apply the correct use of wing anti-ice systems and adhere to recommended rotation rates. Proper training and procedural compliance reduce the risk of incidents and enhance operational safety in winter conditions.
What To Do
Operators should ensure all flight crews are fully aware of and comply with the AFM limitations and procedures regarding cold weather take-offs. They should disseminate information about Bombardier's Winter Operations Awareness and Training resources and confirm that crews complete the recommended take-off safety training courses. Safety management systems should monitor and address risks related to cold weather take-off operations. No specific compliance deadline is stated.
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