As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3394 THE CREW REPORTED THE MAIN CABIN DOOR DIFFICULT TO OPEN FROM THE INSIDE. THE AIRCRAFT WAS REMOVED FROM SERVICE. ACCOMPLISHED LUBRICATION OF SIDE HINGED MAIN DOOR ACTUATING AND LOCKING SYSTEM IAW AMM 52-18-00. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.