As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6046 - CMH TO JFK - DURING INITIAL CLIMB AT APPROXIMATELY 2,000 TO 2,500 FT THE CREW RECEIVED A LAV SMOKE WARNING INDICATION. THE FLIGHT ATTENDANT THEN CONFIRMED SMOKE IN THE AFT CABIN. THE SMOKE CLEARED DURING THE RETURN TO CMH AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THAT E2 WAS OVER SERVICED BY 2 QUARTS OF OIL. THE EXCESS OIL WAS REMOVED AND THE OIL LEVEL WAS BROUGHT BACK TO SERVICEABLE LEVELS. DURING ENGINE RUNS THERE WERE NO FURTHER DISCREPANCIES REPORTED.