As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED CREW DOOR WOULD NOT UNLOCK. INSPECTION REVEALED THE PIN ON BELLCRANK DISENGAGED FROM THE CAM ASSY AND BACK PIN WHEN KNOB WAS PULLED OUT TO ITS FULL EXTEND. SUBMITTER RECOMMENDED INSTALLING LONGER PIN ON BELLCRANK ASSY OR A STOP-TO-LIMIT TRAVEL WHEN THE KNOB IS PULLED.