As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED WHILE SETTING UP FOR APPROACH HAD MAU 1B FAIL ALONG WITH A SPOILER FAULT. CREW DECLARED AN EMERGENCY FOLLOWED QRH PROCEDURES LANDED WITHOUT INCIDENCE. MAINTENANCE WAS DISPATCHED TO A/C TROUBLESHOT AND FOUND MAU 1 POWER SUPPLY INOPERATIVE. REMOVED AND REPLACED MAU 1 POWER SUPPLY, OPERATIONAL CHECK GOOD. A/C WAS RETURNED TO SERVICE.