As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE DURING CLIMB.-C/A-PERFORMED GVI OF AFT LAV NO SMOKE OR SMELL NOTED. PERFORMED AFT LAV SMOKE DETECTOR TESTT IAW EMB 175 AMM 36-14-01. TEST PASSED OKAY FOR SERVICE. FLIGHT ATTENDANT OBSERVED PASSENGER EXIT LAV AFTER THE LAV SMOKE WARNING.