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 LAVATORY SMOKE LIGHT INDICATION, IN FLIGHT DECK, ON ARRIVAL PASSING 10,000 FEET. FLIGHT ATTENDANDANTS SAW NO INDICATION IN ANY LAVATORY. MAINTENANCE PERFORMED SATISFACTORY TEST OF LAVATORY SMOKE PER AMM 26-14-00.