As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, THE CREW RECEIVED A PROXI SYSTEM FAIL INDICATION AND PERFORMED A GO-AROUND. ON THE SECOND APPROACH, THE LANDING WAS NORMAL AND FLIGHT 4009 LANDED WITH NO FURTHER INCIDENTS. MAINTENANCE THEN INSPECTED THE PROXI SYSTEM IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00, BUT COULD NOT DUPLICATE ANY DEFECTS. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.