Nosewheels in most modern TurboJet Transports will "center when the shock strut is extended as after liftoff when appreciable weight is removed from the strut. If this were not to occur, chances are when the gear is retracted and not centered, structual damage of some accord would certanly happen as gear attempts to stow in the underside of the bonnett. When the strut is fully extended, the steering mechanism is disconected when the centering mechanism is activated. Obviously, different models operate somewhat differently, however, same concept.