As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT MOMENTARY LAV SMOKE WARNING FROM FOWARD LAV .UPON INSPECTION OF LAV NO SMELL OR OTHER SIGNS OF SMOKE OR E CIGARETTE VAPOR. PERFORMED LAVATORY SMOKE DETECTOR OPERATIONAL CHECK IAW ERJ-175 AMM 26-14-01 OPS CHECK GOOD A/C OK FOR SERVICE