Originally Posted by CaseTractor

anyone know the purpose of the servo that is disabled but mechanically connected? The report implies the SVO-730 asssits in maintaining runway centerline during rollout, but an option not active (but installed) per UAL requirement.

Eitherway it's a bad deal to have a part that freezes and locks rudder inputs by the pilots. Hopefully a one of bad component and not more in the fleet.