As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4177, CREW REPORTED MAIN CABIN DOOR BINDS WHEN TRYING TO OPEN IT AFTER PRESSURIZATION. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED WORN ACTUATING CAM WASHER PER MM 52-18-01. OPS CHECKED GOOD. REF NRWC NR 646-ORD-00846. THE AIRCRAFT WAS RETURNED TO SERVICE.