As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2761 - EWR - FLIGHT CREW REPORTED LAV SMOKE INDICATION ON EICAS DURING FLIGHT. EWR MX PERFORMED OPERATIONAL CHECK OF LAVATORY SMOKE INDICATION SYSTEM AND COULD NOT DUPLICATE THE PROBLEM. AIRCRAFT WAS APPROVED TO RETURN TO SERVICE.