As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FL 1229, ON APPROACH, CREW RECEIVED APU FIRE WARNING LIGHT AND APU AUTO SHUTDOWN. THE APU FIRE BOTTLE DISCHARGED AUTOMATICALLY. THE APPROACH CONTINUED AND THE FLIGHT LANDED WITH NO FURTHER INCIDENT. NO INDICATION OF FIRE WAS FOUND. MAINTENANCE CHECKED FOR HOT AIR LEAKS AND FOUND NONE. ALL OTHER SYSTEMS CHECKED NORMAL. FIRE BOTTLE REPLACED AND AIRCRAFT RELEASED FOR SERVICE. (M)