411A.
If the bogie is not in the correct position, damage to the wheel well/doors can occur or the gear can become jammed in the well...not good in either case.
The 757 has a mechanism that tilts the bogie when it enters the wheelwell if it fails to tilt by it self. Therefore no damage wil occure to either the wheel well nor its doors, and as the gear has the correct tilt it will not be jammed in the well. As for landing: At touchdown the gear will de-tilt and then the aricraft enters ground mode again.
Ergo: No problem using the override switch
Pretty clever huh?