As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN DOOR CAN OPEN ONLY FROM OUTSIDE. TROUBLESHOOT DOOR CHECK SECURITY OF INTERNAL DOOR RED HANDLE FOUND NO DEFECTS RESECURED DOOR HANDLE AND TRIED TO OPEN MCD. THE RETAINING RING WAS HYPER EXTENDED AND OUT OF PLACE. THIS CAUSED THE TORQUE TUBE TO INTERMITTENTLY SLIDE AROUND. REMOVED AND REPLACED THE RETAINING RING. OPS CHECK SAT.