As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS SEVERAL AUTO PILOT FAILURES ON BOTH SIDES WITH ASSOCIATED FD AND OTHER FLAGS. REMOVED AND REPLACED NR 1 INVERTER DUE TO POSSIBLE A/C POWER PROBLEMS TO AHRS AND AUTOPILOT COMPUTERS. OPS CHECK OF INVERTER AND A/P GOOD. REF EMB MM 120 24-21-01.