As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEM - FLT 1229 - ON FINAL TO MEM, CREW STARTED APU. AFTER NORMAL START, THE APU FIRE WARNING SOUNDED. THE APU SHUTDOWN AUTOMATICALLY AND THE FIRE BOTTLE ACTIVATED. CREW CONTINUED APPROACH AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND NO EVIDENCE OF A FIRE. MAINTENANCE REPLACED THE FIRE DETECTION CONTROLLER. (M)