What was found
NR 4 BRAKE WAS OVER 300 DEGREES AFTER LIFTOFF, GEAR DOWN, COOLED SO ENROUTE TEMPS NR 1, 65 , 2, 70, 3, 70, 4, 160, AFTER ONE AND A HALF HOURS ALOFT. DURING LANDING, NO BRAKING REQUIRED FOR ROLL OUT NR 4 BRAKE 75 ON TOUCHDOWN. DURING TAXI IT HEATED TO 360 DEGREES, BRAKE FAN ON BRINGS TEMP DOWN NORMALLY. NR 3 BRAKE 60 PEAK, TAXI BRAKING PRIMARILY LEFT MAIN ONLY TEMPS NR 1, 135, 2, 125 NORMAL. FOUND THE NR 4 BRAKE HAD A CARBON STATOR BROKEN JAMMING BRAKE, REMOVED AND REPLACED THE NR 4 BRAKE IAW AMM 32-42-27.