As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4200 THE LIGHT ATTENDANT REPORTED THE MAIN CABIN DOOR WAS DIFFICULT TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED MAIN CABIN DOOR FRAME ROLLERS IAW EMB MM 53-21-00. NO DEFECTS NOTED, DOOR OPENING WITH NO DIFFICULTY. THE AIRCRAFT WAS RETURNED TO SERVICE.