As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3475 THR CREW REPORTED THE MAIN CABIN DOOR WAS DIFFICULT TO LOCK AND UNLOCK. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED EXTERNAL MECHANISM OF MAIN CABIN DOOR IAW EMB 145 AMM 52-18-00. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERIVCE.