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 BRIEFLY ANNUNCIATED AND CLEARED IMMEDIATELY. NO EVIDENCE IN ANY LAVATORY OF SMOKE. MAINTENANCE PERFORMED OPERATIONAL TEST OF LAVATORY SMOKE DETECTOR SYSTEM PER AMM 26-17-00. WITH NO FAULTS OR EVIDENCE OF SMOKE NOTED..