As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 707 FROM DEN TO TOL. DURING CRUISE LEVEL, THE FORWARD LOWER CARGO COMPARTMENT FIRE LIGHT CAME ON. APPROPRIATE CHECK LIST WERE ACCOMPLISHED AND FIRE WARNING LIGHT REMAINED ILLUMINATED. NOTIFIED ATC OF THE FIRE WARNING LIGHT AND LANDED WITHOUT INCIDENT. INSPECTED FORWARD CARGO PIT AND FOUND NO EVIDENCE OF FIRE. REPLACED FIRE DETECTION CENTRAL CONTROL UNIT AND BATTERY AND PERFORMED SYSTEM OPERATIONAL CHECK IAW SECURAPLANE ST3000 MANUAL. AIRCRAFT RETURNED TO SERVICE.