As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4266 - BAGGAGE SMOKE WARNING INDICATOR ILLUMINATED AFTER LANDING. VISUALLY CONFIRMED NO SMOKE. BAGGAGE EXTINGUISHER BOTTLES WERE DISPENSED. NO FURTHER INCIDENTS. REMOVED AND REPLACED SMOKE DETECTOR AND BOTH EXTINGUISHERS. PERFORMED OPS CHECK OF SYSTEM, OPS CHECK GOOD. (M)