As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI TO RWY NOTICED UNUSUALLY HIGH POWER SETTING REQUIRED FOR NORMAL TAXI SPEEDS TO BE MAINTAINED. BRAKE TEMP LIGHT ILLUMINATED AND TEMPS OF 5-7 ON L/H TRUCK. BRAKES LOCKED UP AND AIRCRAFT COULD NOT MOVE REGARDLESS OF POWER SETTING. WE WAITED FOR BRAKES TO COOL AND IN CONFERENCE WITH MAINTENANCE CREW TAXIED AIRCRAFT BACK TO THE GATE. AIRCRAFT WAS GROUNDED.