As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3975 THE CREW REPORTED THE CABIN DOOR HARD TO CLOSE. THE RED LINES ON THE LEFT SIDE OF CABIN DOOR DO NOT MATCH UP. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED OPERATIONAL TEST OF MAIN CABIN DOOR IN A EMB AMM 52-18-00. THE OPERATIONAL TEST WAS GOOD. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.