As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4078, THE CREW REPORTED THE MAIN CABIN DOOR WAS OCCASIONALLY HARD TO OPEN AND CLOSE. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBED THE MAIN CABIN DOOR ROLLERS. NO FURTHER DEFECTS NOTED. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.