As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL/SJC - FLT 712 - DURING DESCENT INTO SJC; CARGO COMPARTMENT SMOKE DETECTOR ILLUMINATED. VISUALLY VERIFIED NO SMOKE PRESENT IN CARGO CABIN. LIGHT WENT OUT AFTER 10 MINUTES. AGAIN DURING SHORT FINAL APPROACH SMOKE DETECTOR ILLUMINATED. AGAIN VERIFIED VISUALLY NO SMOKE IN CARGO CABIN. (X)