As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT FORWARD ENTRY DOOR ARMING HANDLE WOULD NOT SEAT AFTER THE DOOR WAS CLOSED. THE AIRPLANE WAS REMOVED FROM SERVICE AND THE EXTERNAL EMERGENCY RELEASE HANDLE WAS RESET, ALLOWING THE INTERIOR ARMING HANDLE TO SEAT. THE CAUSE OF THE ARMING HANDLE NOT SEATING IS UNKNOWN.