As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON DESCENT, LAVATORY SMOKE LIGHT ON, WENT OUT QUICKLY. FLIGHT ATTENDANTS HEARD IT IN THE AFT LAVATORIES AND UPON INSPECTION, FOUND NO SMOKE. MAINTENANCE PERFORMED SATISFACTORY OPERATIONAL CHECK PER AMM 26-17-00.