Which item is associated with standby hydraulic system rather than A or B?

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Multiple Choice

Which item is associated with standby hydraulic system rather than A or B?

Explanation:
Standby hydraulic power is the backup source that keeps essential flight-control functions operating when the normal hydraulics are unavailable. The item tied directly to that standby power is the standby yaw damper. It provides automatic rudder damping to maintain directional stability and suppress dutch roll even if the main hydraulic systems aren’t available. Ailerons and ground spoilers rely on the primary hydraulic systems, so they aren’t associated with the standby system in the same way. Alternate nose wheel steering can be an emergency function, but its link to standby hydraulics isn’t as direct as the yaw damper’s.

Standby hydraulic power is the backup source that keeps essential flight-control functions operating when the normal hydraulics are unavailable. The item tied directly to that standby power is the standby yaw damper. It provides automatic rudder damping to maintain directional stability and suppress dutch roll even if the main hydraulic systems aren’t available. Ailerons and ground spoilers rely on the primary hydraulic systems, so they aren’t associated with the standby system in the same way. Alternate nose wheel steering can be an emergency function, but its link to standby hydraulics isn’t as direct as the yaw damper’s.

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