What is the function of the electric motor-driven pump in the standby hydraulic system?

• A. To provide emergency lift
• B. To power the rudder and thrust reversers
• C. To control flaps
• D. To manage fuel flow

Answer: (B)

The electric motor-driven pump in the standby hydraulic system primarily serves to power key flight control systems, including the rudder and thrust reversers. This role is crucial, especially during situations where the primary hydraulic system may fail or become unavailable. By ensuring that the rudder can still be controlled, the pump helps maintain the aircraft’s directional stability, which is vital for safe operation. Additionally, thrust reversers are essential for deceleration during landing, giving the aircraft the ability to slow down quickly and efficiently. The standby hydraulic system's electric pump ensures that these critical functions remain operational when needed, providing a layer of redundancy and enhancing overall safety.