As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2493, THE CREW REPORTED A LAV SMOKE INDICATION AFTER STARTING THE NUMBER ONE ENGINE. THE CREW REPORTED THAT THERE WAS NO SMOKE IN THE LAV, BUT WAS HOT. CYCLING THE CIRCUIT BREAKER CLEARED THE WARNING. MAINTENANCE INSPECTED THE AIRCRAFT, AND LAV FOR SIGNS OF SMOKE / BURNED MATERIAL WITH NO DEFECTS NOTED. MAINTENANCE VERIFIED NORMAL OPERATION OF THE LAV SMOKE DETECTOR, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.