As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED AVIONICS MAU 3A FAIL MESSAGE. DECLARED AN EMERGENCY AND DIVERTED. LANDED WITHOUT INCIDENT AND TAXIED TO GATE. MAINTENANCE FOUND THE NIC PROCESSOR IN MAU 3 WOULD NOT PASS TEST, R & R NIC PROCESSOR MODULE IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.