Stall Protection System — Out of Tolerance Angle of Attack Transducers
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier CL-600-2B19 aircraft must replace the AOA transducers with part numbers 45-150-340, C16258AA, and C16258AB within 9000 flight hours or 46 months from July 13, 2018, whichever occurs first. Installation of these AOA transducers is prohibited from the directive's effective date. Replacement must follow the procedures outlined in Bombardier Service Bulletin 601R-27-165 or later approved revisions.
Summary
Canadian Airworthiness Directive CF-2018-17 addresses the stall protection system on Bombardier Inc. model CL-600-2B19 aeroplanes, specifically those with serial numbers 7003 through 7067 and 7069 through 7891 equipped with Angle of Attack (AOA) Transducers part numbers 45-150-340, C16258AA, and C16258AB. This directive mandates actions to ensure the accuracy of AOA transducers to maintain proper stall protection system function. It aims to prevent potential loss of control due to late stall protection activation caused by erroneous AOA signals.
What changed
CF-2018-17 introduces a requirement to replace or modify the specified AOA transducers within 9000 flight hours or 46 months from the effective date. It prohibits the installation of the affected AOA transducers on the specified Bombardier CL-600-2B19 aircraft from the directive's effective date. The directive references Bombardier Service Bulletin 601R-27-165 for approved replacement instructions.
Why it matters
This directive is critical for operators and maintenance organizations to ensure the stall protection system activates correctly, preventing potential loss of aircraft control. Compliance reduces the risk of undetected errors in AOA transducer signals that could delay stick pusher activation. It also ensures adherence to Canadian Aviation Regulations, avoiding regulatory penalties and enhancing flight safety.
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