As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4122 - THE CREW DECLARED AN EMERGENCY INTO ORD DUE TO AN AIR GROUND FAIL MESSAGE AND A THRUST REVERSER DISAGREE MESSAGE. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED RELAY K0352 LEFT RELAY SUPPORT IAW EMB AMM 20-13-02 FUNCTIONAL CHECK FLIGHT SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.