As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3900 THE CREW REPORTED THE MAIN CABIN DOOR WAS HARD TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED THE MAIN DOOR FRAME ROLLER IAW EMB 140 M/M 53-21-02. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.