As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FOR THE FERRY FLIGHT, THE CREW REPORTED A LAV SMOKE INDICATION WITH NO SIGNS OF SMOKE OR ODOR AND RETURNED TO FIELD. THE AIRCRAFT WAS FERRIED TO CMH FOR FURTHER TROUBLESHOOTING. IN CMH THE NR 2 ENGINE WAS REMOVED AND REPLACED, THE AIRCRAFT WAS THEN TEST FLOWN WITH NO FURTHER DEFECTS NOTED.