Flight Controls — Flap Fail on Approach
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bombardier BD-700-1A10 and BD-700-1A11 aircraft must amend their Transport Canada approved AFMs by incorporating the specified chapters within 30 days of the effective date. Flight crews must be informed of these changes and operate the aircraft according to the revised procedures. The effective date for compliance is 17 June 2022.
Summary
Canadian Airworthiness Directive CF-2022-30 addresses a flap, slat, or slat-flap failure issue on approach for Bombardier BD-700-1A10 and BD-700-1A11 aircraft models. The directive mandates revisions to the Airplane Flight Manual (AFM) and Quick Reference Handbook (QRH) to modify procedures related to flap failure warnings. This AD aims to prevent unexpected stall warnings and stick shaker activation caused by resetting the slat flap control unit during flight.
What changed
CF-2022-30 introduces a mandatory revision to the AFM and QRH that removes the in-flight reset procedure of the slat flap control unit to avoid triggering conservative stall advance modes in the stall protection computer. The affected non-normal procedures for flap, slat, and slat-flap failures have been updated accordingly. This is a new regulation requiring immediate incorporation of these procedural changes.
Why it matters
This directive is critical for flight safety as it prevents unexpected stall warnings and increased crew workload during the critical approach phase. Operators must adjust their procedures to avoid higher landing speeds and potential diversions caused by erroneous stall protection system behavior. Compliance ensures adherence to Canadian Aviation Regulations and maintains aircraft airworthiness.
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