What is the correct response to an uncommanded nose wheel deflection?

In the case of an uncommanded nose wheel deflection, pressing the Nose Steer Disc Switch is the appropriate response. This switch disables the nose wheel steering system, allowing the pilot to regain control of the aircraft's direction. By engaging the Nose Steer Disc, the system limits the nose wheel's movement, preventing further unintended deflections that could jeopardize the safety and stability of the aircraft.

Manual steering, while a consideration, may not provide the immediate corrective action needed to stabilize the situation effectively. Similarly, increasing throttle or deploying aerodynamic brakes are not related to addressing the root cause of an uncommanded steering issue and could potentially exacerbate the problem. Therefore, using the Nose Steer Disc Switch is the most effective and immediate measure to stabilize the aircraft's steering.