As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2921 THE FLIGHT ATTENDANT REPORTED THE MAIN CABIN DOOR WAS HARD TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. CLEANED AND LUBED DOOR FRAME ROLLERS REF EMB-140 AMM 53-21-02. THE OPERATIONAL CHECK WAS GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME. THE AIRCRAFT WAS RETURNED TO SERVICE.