As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 114 MSY-JFK, CREW DECLARED AN EMERGENCY DUE TO AVNX MAU 1A FAIL ON DESCENT THRU FL 280. MULTIPLE ASSOCIATED EICAS MESSAGES FAIL MESSAGE CLEARED ON FINAL TO LAND. ACCOMPLISHED FIM TASK 45-45-00-810-939-A00. REMOVED AND REPLACED MAU 1 NIC1 PER AMM 31-41-04 OPS CHECK OK, OK FOR SERVICE.