As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTING NR 2 ENGINE CREW NOTED CARGO SMOKE LIGHT WAS ILLUMINATED. FA INVESTIGATED. NO SMOKE FOUND. CREW HAD RAMP AGENTS CHECK CARGO BAY AND NO SMOKE WAS FOUND IN CARGO BAY. LIGHT STAYED ON WITH NO SMOKE IN CARGO BAY. REPLACED NR 2 CARGO BIN SMOKE DETECTOR IAW SF340 MM. ALL CHECKS GOOD AT THIS TIME.