When does the "safe mode" pusher activate?

• A. When exceeding stall speed
• B. When pusher is activated at low speed
• C. When twisting or asymmetry is sensed and flap angle is greater than 2 degrees
• D. When CG is not within limits

Answer: (C)

The correct answer relates to the function of the "safe mode" pusher, which activates when the system detects a significant issue such as twisting or asymmetry during flight, in conjunction with the flap angle being greater than 2 degrees. This condition is critical because it indicates that the aircraft is operating in a potentially unstable aerodynamic state. The "safe mode" pusher is designed to enhance safety by providing inputs to the control surfaces to help the pilot maintain control and prevent a stall, particularly during critical phases of flight where the flaps are deployed, and the aircraft's configuration can induce greater drag and altered lift characteristics.

Understanding this activation condition is crucial for pilots operating under Part 135 regulations, as awareness of aircraft behavior under specific configurations enhances operational safety. The sensing of physical configuration anomalies combined with flap deployment is a direct indication that the aircraft requires corrective actions to remain stable.