As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, THE CREW RECEIVED A RED WARNING PANEL DOOR LIGHT AT 24,000 FT. THE CREW DESCENDED AND THE LIGHT EXTINGUISHED AT 21,000 FT. UPON ARRIVAL, THE PSEU WAS RERACKED AND OPERATIONAL CHECKS WERE PERFORMED IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 52-00-00. NO DEFECTS WERE NOTED AND THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.