As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CTRL NO DISPATCH AFTER LANDING. AVNX MAU 1A FAIL FAULT ADVISORY SHOWN. EMERGENCY DECLARED. RESET MAU 1 POWER PER QRH. INFO TO MTX NOTED. CAPT ID# 581763. PERFORMED RTS TEST IAW EMB 170 QRH 7.3.22. FAULTS CLEARED. INFO TO MTX NOTED. PIC 581763