As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO DTW RECEIVED "CARGO SMOKE" MASTER WARNING, QRH FOLLOWED. BOTTLES DISCHARGED, DECLARED EMERGENCY FOLLOWED BY UNEVENTFUL LANDING. ACFT INSPECTED BY EMERGENCY VEHICLES WITH NO FIRE OR SMOKE FOUND "FALSE WARNING". REMOVED AND REPLACED THE CARGO FORWARD DETECTOR IAW BOMBARDIER AMM. OPERATIONALLY CHECKED GOOD. (S)