Loss of hydraulic system ___ will cause the nosewheel steering to go into free castoring mode.

• A. 1
• B. 2
• C. 3
• D. 1 and 3

Answer: (C)

Nosewheel steering is driven by hydraulic power, and in this aircraft the steering actuators rely on a specific hydraulic source. When that hydraulic supply is lost, there is no pressure to move or center the nosewheel, so it becomes free to caster and follows the airflow rather than being actively steered by the rudder pedals. The remaining hydraulic systems, if intact, do not provide the necessary actuation for nosewheel steering in this configuration, so losing that particular system causes the nosewheel to go into free castoring mode.