As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 24 - EN ROUTE ORD-BHX, AFT CARTO FIRE LIGHT ILLUMINATED. NO FIRE, AIR INTERRUPTED AND LANDED DTW WITHOUT INCIDENT. REPLACED APU/CARGO FIRE CONTROL PANEL. ACCOMPLISHED TEST OF SYSTEM. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)