As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVNX MAU 1B FAIL IN FLIGHT. ASSOCIATED MESSAGES SPOILER FAULT AND SPDBRK FAIL. EMERGENCY DECLARED. PERFORM POWER DOWN POWER UP RESET PER QRH 7.2.1 AND 7.2.2. MESSAGE EXTINGUISH A/C OK FOR SERVICE. AND PERFORM QRH 7.3.22 AND AMM 27-00-00. OPS CHECK GOOD