As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 3427 THE CREW REPORTED THE MAIN CABIN DOOR WAS HARD TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. CLEANED AND LUBED MAIN CABIN DOOR STRIKE PLATES IAW 52-18-00. NO PARTS REMOVED OR REPLACED. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.