As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, THE CREW RECEIVED A PASSENGER DOOR UNLOCK INDICATION AND RETURNED TO PHL. THE AIRCRAFT WAS THEN FERRIED TO DAY. MAINTENANCE INSPECTED AND ADJUSTED THE DOOR ROD IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 52-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.