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 LIGHT ILLUMINATED IN FIRST CLASS LAVATORY ON DESCENT. PASSENGER WAS IN LAVATORY, BUT NO SMOKE DETECTED. SMOKE LIGHT EXTINGUISHED IN 1 MINUTE. INSPECTED LAVATORY. NO EVIDENCE OF SMOKE / FIRE DETECTED. ACCOMPLISHED SMOKE DETECTION OPERATIONAL TEST PER AMM 26-14-00. ALL CHECKS NORMAL, NO DISCREPANCIES NOTED.