What was found
CREW REPORTED A LOT OF SMOKE COMING FROM RT MLG ON LANDING. THE CREW PUSHED ON THE BRAKES AND LOST APPROX 50 PERCENT OF BRAKING AND THEN CREW RECEIVED A BRAKE DEGRADED MESSAGE ON EICAS. THE NR 3 BRAKE DISINTEGRATED ON LANDING. ON POST FLIGHT A LOT OF DEBRIS WAS NOTED ON THE TARMAC LEADING UP TO THE GATE WHICH APPEARED TO BE BRAKE PARTS. AC REMOVED FROM SERVICE. C/A REMOVED AND REPLACED NR 3 BRAKE AND TIRE ASSY. AIRCRAFT RETURNED TO SERVICE. (K)