As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LAVATORY SMOKE DETECTOR AURAL ALERT AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR. FLIGHT ATTENDANTS VERIFIED NO SMOKE AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR WENT AWAY. PERFORMED CHECK OF ALL LAVATORY SMOKE DETECTORS. ALL TEST OKAY.