As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT DECK DOOR STUCK CLOSED IN FLIGHT. CABIN ALTITUDE 7400FT. MAINTENANCE FOUND A LOOSE DOOR TRIM SCREW THAT HAD SHIFTED AND OBSTRUCTED THE DOOR IN THE CLOSED POSITION. MAINTENANCE SECURED SCREW INSPECTED SURROUNDING HARDWARE AND TRIM FOR CONDITION / SECURITY AND PERFORMED OPERATIONAL CHECK OF FLIGHT DECK DOOR WITH SATISFACTORY RESULTS PER AMM 52-51-00.