As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AFT LAV MASTER WARNING, EMERGENCY DECLARED -- TRUCKS STANDING BY AS A PRECAUTION. INSPECTED AFT LAV NO EVIDENCE OF FIRE AN THE AREA THE TEMPERATURE TAPE WAS IN NORMAL RANGE. SMOKE CLEARED AFTER LANDING REPORTED BY CREW. OK FOR SERVICE IAW AMM 26-16-00.