As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2914 - EWR - FLIGHT CREW REPORTED LAV SMOKE INDICATION DURING CLIMBING, MESSAGE CLEARED ABOUT 1 MIN LATER. EWR MX PERFORMED OPERATIONAL CHECK ON LAV SMOKE DETECTOR SYSTEM AND COULD NOT DUPLICATE MESSAGE. ACFT WAS APPROVED TO RETURN TO SERVICE.