As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1226 RDU-BOS, CREW DECLARED AN EMERGENCY DUE TO BRAKE LEFT FAULT EICAS MSG WHEN GEAR EXTENSION. EXECUTED GO-AROUND & COMPLIED WITH QRH. RECONFIGURED FOR LANDING FLAPS FULL. NORMAL LANDING. REMOVED AND REPLACED MAIN BRAKE CONTROL MODULE NR 2 IAW AMM 32-41-07, AS PER FIM 32-41-00-810-825-A SYSTEM CHECK GOOD.