As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#484, RDU-BOS. (AIRCRAFT DECLARED AN EMERGENCY INTO BOS). 'MULTIPLE EICAS MESSAGES ON 20 MILE FINAL. DC BUS 2 OFF AVNX MAU 3B FAIL AVNX MAU 2A FAIL TRU 2 FAIL; REMOVED AND REPLACED TRU 2 IAW AMM 24-31-01. OPERATIONAL TEST OK. AC OK TO CONTINUE.'