As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 131 BWI-PHL, CREW REPORTED HIGH BRAKE TEMPERATURE ON LEFT INBOARD MAIN AFTER TAKEOFF. DURING APPROACH INTO PHL, THE CREW REQUESTED EMERGENCY EQUIPMENT TO BE STANDING BY. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE BRAKE TEMP MONITORING UNIT (BTMU) PER AMM 32-47-18 PB401 & OP'S CK'D OK. AIRCRAFT RETURNED TO SERVICE.