As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT DISC LIGHT ON & EICAS MSG 'AUTOPILOT DISC' DISPLAYED WITH 2 AUTOPILOT SYS ENGAGED IN COMMAND (1=L, 2=C, 3=R). CREW COMMENTS: CTR AP INOP IN CRUISE WOULD NOT RESET LT AND RT AP OK: MCDP STORED FAULTS SHOWS NO INFC FCC CTR, CONFIRMED BY TEST. FCC C RESET PERF, THEN ALL 3 FCC TEST PERF ACC, TESTS PASSED. AC DOWNGRADED TO CAT2 ONLY. REPLACED CTR FLIGHT CONTROL COMPUTER AND CAT CK PERFORMED.