As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL TO MSP - UPON LOWERING LANDING GEAR ON FINAL APPROACH, CREW RECEIVED "INBOARD BRAKE INOP" EICAS MESSAGE. THE CREW DID A GO-AROUND TO CONSULT THE QRH AND EVALUATE THE SITUATION. AS A PRECAUTION, AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED ON THE LONGEST RUNWAY. THE AIRCRAFT LANDED AND TAXIED TO THE GATE WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE FAULT WITH THE CMC TO THE INBOARD BRAKE CONTROL VALVE, WHICH WAS REPLACED AND THE AIRCRAFT BRAKING SYSTEM OPS CHECKED GOOD.