As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S AUTOPILOT FAILED FFOD CHECK AND COMPUTER FLAG STAYS IN VIEW. INSPECTED APC NR 1, NR 1 AHRS AND ADI NR 1 WIRING AND CONNECTORS. NO DEFECTS NOTED. CONTINUOUSLY TESTED AND NO FAULTS FOUND. REMOVED AND REPLACED NR 1 AHRS FOR TROUBLESHOOTING. OPS CHECK GOOD IAW MM 34-21-00 AND 22-10-00.