As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, CREW COULD NOT ENGAGE AUTOPILOT. DURING HAND FLYING, CREW GOT SEVERAL UNCOMMANDED GO-AROUND COMMANDS IN WHICH COMMAND BARS WOULD POP-UP AND THROTTLES WOULD ADVANCE TO FULL POWER. MX FOUND THE BODY OF GO-AROUND SWITCH HAD SEPARATED WHICH CAUSED SWITCH TO RECESS A BIT INTO THE YOKE. BECAUSE SWITCH POSTS DID NOT HAVE HEAT SHRINK ON THEM, THEY WERE SHORTING OUT CAUSING THE UNCOMMANDED GO-AROUND SCENERIO. MX ENSURED SHRINK TUBE WAS INSTALLED ON NEW SWITCH.