As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED MAU 3A FAIL MSG DURING CRUISE, DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT AT MCI. MAINTENANCE TROUBLESHOT, AND REMOVED AND REPLACED NIC PROC 5 AND NIC PROC 6 PER EMB AMM, OPS CHECK GOOD. A/C WAS THEN RETURNED TO SERVICE.