What was found
ON FLIGHT 4307 THE CREW REPORTED THAT THE MAIN CABIN DOOR WAS DIFFICULT TO OPEN AND CLOSE. THE FIRST OFFICER HAD TO ASSIST THE FLIGHT ATTENDANT TO OPEN AND CLOSE THE DOOR. THE AIRCRAFT WAS REMOVED FROM SERVICE. RE-ADJUSTED THE MAIN DOOR STOPS IAW EMB 140 AMM 52-18-00. LUBRICATED MAIN DOOR SEAL AND MAIN DOOR ROLLERS IAW AMM 20-30-02 AND ADJUSTED PASSENGER DOOR IAW AMM 52-18-00. NO PARTS REMOVED OR REPLACED. THE OPERATIONAL AND TENSION CHECK WAS GOOD AND WITHIN TENSION LIMITS. THE AIRCRAFT WAS RETURNED TO SERVICE.