What was found
WHILE IN CRUISE, THE CREW RECEIVED A RED WARNING PANEL DOOR LIGHT. THE SYSTEMS PAGE SHOWED IT WAS THEMAIN CABIN DOOR. THE CREW FOLLOWED THE QUICK REFERENCE HANDBOOK AND DIVERTED TO TRI. OUTSTATION MAINTENANCE FOUND NO DEFECTS SO THE AIRCRAFT WAS FERRIED TO P IT WHERE MAINTENANCE INSPECTED THE AIRCRAFT IN ACCORDANCE WITH DORNIER MAINTENAN CE MANUAL 52-00-00. NO DEFECTS WERE FOUND AND THE PROBLEM COULD NOT BE DUPLICAT ED. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WASRELEASED FOR SERVICE.