As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LAVATORY SMOKE WARNING ON EICAS WITH NO SMOKE DETECTED. ACFT LANDED WITHOUT INCIDENT. MX R & R THE LAVATORY SMOKE SENSOR, AND THE LAVATORY SMOKE DETECTOR PANEL, OPS TESTED WITH NO DEFECTS, AND ACFT APPROVED FOR RETURN TO SERVICE.