As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GSP TO LGA - UPON REACHING 10,000 FT DURING DESCENT, THE APU WAS STARTED DUE TO AN MEL'D NR 3 GENERATOR. SHORTLY AFTER STARTING APU, CREW RECEIVED A FIRE WARNING EICAS MESSAGE. AFTER TAKING THE APPROPRIATE ACTION THE APU FIRE INDICATION WENT AWAY. THE AIRCRAFT LANDED WITHOUT INCIDENT, AND WAS INSPECTED BY FIRE CREWS AND MAINTENANCE AND NO TRACES OF FIRE DAMAGE WERE FOUND. MAINTENANCE TROUBLESHOT THE FAULT TO THE APU FIRE CONTROL OVERHEAD PANEL. THE PANEL WAS REPLACED AND THE APU FIRE CONTROL SYSTEM OPERATED NORMALLY.