As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL INTO ROC, THE APU FIRE WARNING ILLUMINATED, FOLLOWED SHORTLY BY THE APU FIRE FAIL MESSAGE. THE APU DID AN AUTO SHUTDOWN. UPON LANDING, MAINTENANCE PERFORMED A VISUAL INPSECTION OF THE APU AND APU COMPARTMENT. THERE WAS NO INDICATION THAT THERE HAD BEEN ANY FIRE. AS A SAFETY PRECAUTION, THE APU WAS DEFERRED PER THE MEL, UNTIL FURTHER TROUBLESHOOTING COULD BE DONE AT A MAINTENANCE BASE.