As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DECENT FROM 8-6000 FEET CREW HAD AURAL AND EICAS MESSAGE. LAV SMOKE WARNING IN FLIGHT PROCEDURE PER QRH PULLED C/B E9 AND E10. NO APU RUNNING. NO SMOKE NOTED AND NO ODOR NOTED. R&R LAV SMOKE DETECTOR SENSOR. OPS CHECK SAT. PERFORMED HIGH POWER RUNS WITH NO DEFECTS NOTED AND INSPECTED WIRING WITH NO FAULTS. UPON FURTHER TROUBLESHOOTING OF THE LAV DETECTION, FOUND GASPER LINE FILTER DAMAGED. R&R GASPER LINE FILTER. NO OTHER DEFECTS NOTED.