As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE (CARGO) DETECTOR ILLUMINATED AT FL 310 AND EXTINGUISHED AT 4000 FEET. ALL A-CONTAINERS OFF LOADED AND FREIGHT BROKEN DOWN AND INSPECTED BY GROUND PERSONNEL AND 2 MEMBERS OF STL FIRE DEPT-NO PROBLEMS FOUND AT THIS TIME. SMOKE DETECTOR PORTS FOUND TO BE CLEAN AND SYSTEM SELF-TEST GOOD AT THIS TIME PER B727 M/M 26-17-02.