As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2224 - EWR - FLIGHT CREW REPORTED LAV SMOKE INDICATION ON EICAS DURING TAKEOFF. CREW PERFORMED AIR RETURN AND LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED SMOKE DETECTOR TEST PANEL AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.