As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3368 THE CREW REPORTED THE MAIN CABIN DOOR WAS EXTREMELY DIFFICULT TO OPEN BY THE FLIGHT ATTENDANT. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBED MAIN DOOR ROLLERS IAW EMB MM 53-21-02. THE OPERATIONAL CHECK OF THE MAIN CABIN DOOR WAS WITHIN LIMITS IAW EMB MM 52-18-00. THE AIRCRAFT WAS RETURNED TO SERVICE.