Ice and Rain Protection — Wing Anti-Ice System — Wing Stall Prior to Touchdown due to Wing Leading Edge Icing
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must revise their AFMs by incorporating the specified limitations and procedures for the Wing Anti-Ice system as per the listed AFM revisions. Flight crews must be informed of these changes and operate the aircraft accordingly. All actions must be completed within 30 days from the effective date of 12 March 2021 unless already accomplished.
Summary
Canadian Airworthiness Directive CF-2021-06 addresses the risk of wing stall prior to touchdown caused by wing leading edge icing on Bombardier Challenger 600 series aircraft, including models CL-600-1A11, CL-600-2A12, and CL-600-2B16. This directive mandates revisions to the Aircraft Flight Manual (AFM) to include new limitations and procedures for the Wing Anti-Ice (WAI) system to prevent ice accumulation on wing leading edges. The directive applies to specific serial numbers within these models.
What changed
CF-2021-06 introduces a requirement to amend the AFM with updated limitations and procedures for the Wing Anti-Ice system to mitigate the risk of wing stall due to undetected ice accumulation. It specifies exact AFM revisions by aircraft serial number and mandates flight crew awareness of these changes. This is a new regulation responding to an incident involving a CRJ200 and the potential for similar events on Challenger 600 series aircraft.
Why it matters
This directive is critical for operators and maintenance teams to ensure flight safety by preventing wing stall caused by ice on the wing leading edges during landing. Compliance reduces the risk of uncommanded roll events and enhances operational procedures related to ice detection and anti-ice system usage. It also ensures regulatory compliance with Canadian Aviation Regulations concerning airworthiness directives.
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