As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3390 THE CREW REPORTED THE MAIN CABIN DOOR WAS HARD TO OPEN AND CLOSE. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED INSPECTION AND LUBRICATED SIDE-HINGED MECHANISM IAW EMB 145 AMM 52-18-00. THE OPERATIONAL CHECK WAS GOOD. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.