As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SMOKE FORWARD CARGO INDICATION QRH PROCEDURE FOLLOWED. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO STL WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE FORWARD CARGO COMPARTMENT SMOKE DETECTOR AT POSITION "C" AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 26-16-15-400.