As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE WARNING ON EICAS. PASSENGER IN LAV AT THAT TIME. REMOVED FROM SERVICE. PERFORMED GVI OF LAVATORY & SURROUNDING AREA, NO SIGNS OF DAMAGE OR DEFECTS NOTED. C/W FIM TASK 26-14-00-810-803-A OPS TEST GOOD. COULD NOT DUPLICATE. NO PARTS REPLACED. RETURNED TO SERVICE.