What was found
DURING TAXI AFTER LANDING THE NR 7 MAIN WHEEL BRAKE WAS HANGING UP AND OVERHEATING. TEMP GOT AS HIGH AS 475 WHILE ALL OTHER BRAKES WERE AT 220. CALLED FOR FIRE SUPPORT AS A PRECAUTION. MAINTENANCE TOWED US IN WITH THE BRAKE STILL HANGING UP. TEMP HAD DROPPED TO 385, BUT CLIMBED BACK UP TO 515 DEGREES AFTER BEING TOWED TO PARKING. FACT 21MAR19 08:52 MEM U UPDATED DISCREPANCY DUE TO SDR. REOP 21MAR19 08:52 U DSCRP IS REOPEN FOR WORK. FOUND NR 7 MAIN LANDING GEAR BRAKE ASSY DRAGGING. REMOVED AND REPLACED NR 7 BRAKE ASSY. OPS CHECKED GOOD AT THIS TIME. OK FOR SERVICE.