As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3231 THE FLIGHT ATTENDANT REPORTED THE MAIN CABIN DOOR WAS DIFFICULT TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. FOUND NUT LOOSE ON DOOR OPEN ROD LINKAGE, RE-SECURE NUT. THE DOOR OPERATIONAL CHECK WAS GOOD IAW EMB 135 52-10-00 AMM. THE AIRCRAFT WAS RETURNED TO SERVICE.