As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, WITH GEAR UP THE CREW RECEIVED THREE RED AND THREE GREEN INDICATIONS INTERMITTENTLY. MAINTENANCE INSPECTED AND REPLACED THE PROXIMITY SENSOR ELECTRONIC UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-61-01. OPERATIONAL CHECKS AND A VERIFICATION FLIGHT WAS FLOWN AND THE AIRCRAFT WAS RELEASED FOR SERVICE.