As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: IN FLIGHT LAVATORY SMOKE DETECTOR AURAL ALERT AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR MESSAGE. NO INDICATION OF LAVATORY SMOKE, MESSAGE WENT OUT AFTER 10 SECONDS AND NOT ABLE TO IDENTIFY WHICH LAVATORY PRODUCED WARNING. ACCOMPLISHED LAVATORY SMOKE WARNING TEST PER TSM 26-17-00 VERIFIED LAVATORY SMOKE DETECTOR COVERS CLEAN.