What was found
(CAN) DURING CRUISE, CREW OBSERVED: NOSE WHEEL STEERING FAIL WOW FAIL RT ENGINE FAULT, LT ENGINE FAULT FLAPS FAULT STABILIZER TRIM FAULT, SPOILERS FAULT, PROXIMITY SYS FAULT, ELECTRICAL FAULT CAS MESSAGES AFTER LANDING, DIFFERENTIAL BRAKING WAS USED TO STEER ACFT. THRUST REVERSERS WERE DEPLOYED, AND SELECTED STOW. RT THRUST REVERSER DID NOT STOW. THIS CREATED DIFFICULTIES IN DIRECTIONAL CONTROL OF THE ACFT. CREW REPORTED THEY MANAGED TO STEER OFF THE ACTIVE RUNWAY, ONTO A TAXI WAY, AT WHICH POINT THEY REQUIRED A TOW TO MOVE THEM OFF THE TAXI WAY.