In which phases of flight must the stall protection switches remain on?

The stall protection switches on the CRJ-900 must remain on during all phases of flight to provide the necessary safety against stall conditions. Keeping these switches activated ensures that stall warning systems are fully operational, enabling timely alerts to the crew if the aircraft approaches a stall situation.

During takeoff, approach, landing, and even cruise, maintaining stall protection is crucial as each flight phase presents different aerodynamic conditions. For instance, during takeoff and landing, the aircraft is often operating at lower speeds and higher angles of attack, where the risk of stalling is particularly critical. In cruise, although the risks may be perceived as lower, unexpected maneuvers or turbulence can still lead to situations where stall protection is essential. Hence, keeping the stall protection switches on throughout all phases of flight is vital for ensuring the overall safety and integrity of the aircraft operation.