The company said it had not put anyone in danger but "in extreme cases, it could affect the ability to steer the steering wheel".

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It is, for example, equipped with a rear-wheel steering system (Precision All-Wheel Steer) that allows the rear wheels to be pointed, independently, up to 2 degrees of toe-angle adjustment in either direction (in or out, negative or positive), for 4 degrees of articulation.

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The pilots then use their usual controls to steer with the nose wheel (which in turn steers the TaxiBot) and to brake with the main landing gear.

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