As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER TAKEOFF, RUDDER RATIO ENGINE INDICATING AND CREW ALERT SYSTEM MESSAGE FOLLOWED BY AILERON LOCKOUT MESSAGE. SPEED AT TIME 270 KNOTS AND INCREASING ALTITUDE 11,000 FEET, ALL 3 AUTOPILOTS WOULD NOT ENGAGE. AIRCRAFT RETURNED. CHANGED LEFT AND RIGHT STABILIZER TRIM/ELEVATOR ASYMMETRY MODULE.