Which component is NOT operated by the emergency hydraulic system?

• A. Landing gear
• B. Nose wheel steering
• C. Flaps
• D. Main gear doors

Answer: (B)

The emergency hydraulic system is a backup power source designed to keep the aircraft in a safe landing configuration when the main hydraulics fail. It provides limited pressure to actuate the components essential for a safe approach and touchdown, such as extending and retracting the landing gear, opening the main gear doors, and deploying the flaps to enable proper lift and drag during the landing phase.

The component that is not operated by this emergency system is the nose wheel steering. Steering the nose gear typically relies on the primary hydraulic circuit or a separate control path, and it isn’t included in the emergency system’s limited, backup suite. This keeps the emergency system focused on elements crucial for a safe landing when normal hydraulics aren’t available.