As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4176 THE CREW REPORTED THEY COULD NOT OPEN MAIN CABIN DOOR FROM INSIDE OF CABIN DOOR. THE DOOR WOULD ONLY OPEN USING LEVER FROM OUTSIDE OF THE AIRCRAFT. THE AIRCRAFT WAS REMOVED FROM SERVICE. RE-SECURED INTERNAL ACTUATING HANDLE ON PASSENGER DOOR IAW EMB 140 AMMM 52-18-05. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.