As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4165 THE FLIGHT ATTENDANT REPORTED THE MAIN CABIN DOOR WAS STIFF TO OPERATE. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED THE MAIN DOOR IAW EMB 145 AMM 52-18-00. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.