As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO EVV AT 18,000 FEET, THE CREW RECEIVED A DOORS INDICATION ON THE RED WARNING PANEL AND DESCENDED TO 10,000 FEET AND THE LIGHT EXTINGUISHED. FLIGHT 4029 LANDED AT EVV WITH NO FURTHER INCIDENTS. OUTSTATION MAINTENANCE INSPECTED AND FOUND GREASE TO BE ON THE 9A EMERGENCY DOOR PROXY SENSOR. OUTSTATION MAINTENANCE CLEANED THE PROXY SENSOR IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 52-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.