As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX DURING TAXI - NR 4 BRAKE OVER TEMPERATURE. FLIGHT CREW REPORTED THE BRAKE BRIEFLY CAUGHT FIRE. A FIRE SUPPRESSOR AGENT WAS DISCHARGED INTO THE BRAKE. NO FIRE DEPARTMENT ACTION WAS REQUIRED AND NO EVIDENCE OF FIRE WAS PRESENT ON BRAKE, TIRES OR PRESSURE LINES. REPLACED NUMBER FOUR BRAKE ASSEMBLY AND MAIN WHEEL AND TIRE ASSEMBLY. SYSTEM GROUND CHECKED NORMAL OPERATION.