As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: MOMENTARY SMOKE LAVATORY SMOKE WARNING DISPLAYED IN FLIGHT. FLIGHT ATTENDANTS REPORTED ALL LAVATORIES SMOKE FREE, WARNING DID NOT REOCCUR. NO ACTIVE WARNING AT ARRIVAL. MAINTENANCE ACCOMPLISHED TEST/RESET OF LAVATORY SMOKE DETECTION PER AMM 26-17-00.