As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THE MAIN CABIN ENTRY DOOR WAS DIFFFICULT TO OPEN. THE ACFT WAS REMOVED FROM SERVICE. LUBICATED MAIN DOOR ACTUATING AND LOCKING MECHANISM ROLLERS IN REF TO AMM 52-18-00. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.