As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 214 - CLT-ATL - ON APPROACH TO ATL, THE APU HAD AN AUTOMATIC SHUTDOWN AND 'APU FIRE' WARNING WHEN THE SPEEDBRAKE WAS OPERATED. THE APU FIRE BOTTLE WAS DISCHARGED AUTOMATICALLY. NO EMERGENCY WAS DECLARED. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED APU ENCLOSURE AREA AND FOUND NO INDICATION OF FIRE. (M)