As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO SMOKE LIGHT ILLUMINATED ON FINAL INTO DTW, (LIGHT ON & OFF SEVERAL TIMES). COMPLETED QRH, LANDED IN DTW. MAINTENANCE REPLACED BOTH CARGO FIRE BOTTLES AND FWD CARGO SMOKE DETECTOR. ALL WORK DONE IAW SF 340 M/M 26-23-10. ALL CHECKS GOOD.