As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. SMOKE LAVATORY ELECTRONIC CENTRALIZED AIRCRAFT MONITOR MESSAGE ILLUMINATED IN CRUISE. FLIGHT ATTENDANT NOTED RIGHT AFT LAVATORY SMOKE LIGHT IN CABIN. UPON INVESTIGATION NO SMOKE IN RIGHT AFT LAVATORY. ELECTRONIC CENTRALIZED AIRCRAFT MONITOR MESSAGE EXTINGUISHED. NO FAULTS LOGGED AND LAVATORY SMOKE BUILT IN TEST EQUIPMENT TEST PASSED.