As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF THE FLIGHT CREW RECEIVED A BRAKE OVERHEAT WARNING. THE NR 3 BRAKE TEMP WAS FLUCTUATING FROM 6 TO 20 WITH THE GEAR DOWN. PER THE QRH THE CREW DECLARED AN EMERGENCY AND RETURNED. MAINTENANCE REPLACED THE NR 3 BTMS PROBE (THERMOCOUPLE), P/N 6007300 AND RETURNED THE A/C TO SERVICE. NHA (BRAKE UNIT) P/N 90001201PL, S/N MAR05-0217. A/C TSN 16773, CSN 8529. THERE WAS A PREVIOUS SDR SUBMITTED FOR THIS SAME A/C AND DEFECT ON SDR 20101108006.