What is the purpose of steering lockout at high speed in nose gear systems?

• A. Steering lockout prevents steering actuation that could misalign the nose gear during retraction and could result in structural damage.
• B. It allows full nose wheel steering at high speeds to aid control.
• C. It diverts hydraulic fluid away from the nose gear.
• D. It disables braking to protect tires.

Answer: (A)

High-speed steering lockout is used to prevent any nose-wheel steering actuation when the aircraft is moving fast. At high speeds, hydraulic steering could apply steering angles that misalign the nose gear during retraction or place unusual loads on the gear and its attachment, risking structural damage or interference with gear doors. Locking the steering keeps the nose wheel centered, protecting the gear during high-speed normal operations and allowing a smooth retraction sequence when necessary. On the ground, below the lockout speed, the system unlocks so the nose wheel can be steered for taxiing. This isn’t about diverting hydraulic fluid or disabling braking; it’s about not applying steering inputs that could harm the gear at high speeds, while still preserving steering capability for ground maneuvering.