As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. MIA-JFK FLIGHT RETURNED TO MIA ACCOUNT FLIGHT INSTRUMENTATION. OVERWEIGHT LANDING UNEVENTFUL. FLIGHT DIRECTOR AND AUTOPILOT WOULD NOT FOLLOW COMMANDS (NOT REPORTING) ON HEADING AND ALTITUDE, LATERAL AND VERTICAL ALTITUDE (NO FLAGS) ON ALL THREE AUTOPILOTS. REMOVED AND REPLACED FLIGHT CONTROL COMPUTER PER AMM 22-11-01. OPERATIONAL CHECK GOOD.