Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Ground Event / Encounter Other / Unknown
Flight Crew Landed in Emergency Condition
Aircraft
On initial descent for ZZZ; we received a 'WOW INPUT' (weight-on-wheels) caution message accompanied by a 'PROX SYS FAULT' (proximity system fault) status message on the cockpit EICAS displays. We were advised by the QRH for this particular failure that our nose wheel steering may not be available upon landing.Not knowing whether or not our nose wheel steering would be available and in what direction our nose wheel might be pointing upon touchdown; led me to [expedite] our arrival into ZZZ. I advised the flight attendant of the situation and told her to secure the cabin early. Upon touchdown the nose wheel steering had indeed failed; and we were able to clear the runway and taxi (using differential braking) to the gate lead-in line whereupon the station met us with a tug for the final tow-in.
Flight crew experienced a system failure which rendered nose wheel steering inoperative.