As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 3427 THE CREW REPORTED THE MAIN DOOR WOULD NOT OPEN FROM INSIDE, PASSENGERS STUCK ON BOARD. THE AIRCRAFT WAS REMOVED FROM SERVICE. INSPECTED MAIN CABIN DOOR AND RE-ALIGNED ACTUATING HANDLE IAW AMM 52-18-05. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.