As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 3021 - CREW REPORTED THAT DURING CLIMB THE PASSENGER AIRSTAIR DOOR FLEW OPEN, AIRCRAFT RETURNED TO FIELD AND DAMAGE TO THE DOOR OCCURRED UPON LANDING. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED THE PASSENGER DOOR IAW B1900 MM 52-10-00. INVESTIGATION PENDING AS TO CAUSE FO THE DOOR OPENING IN FLIGHT. (M)