As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT INTO JFK FLT NR 2568. APU DET INOP LIGHT CAME ON THEN WENT OUT. APPROX 5 MIN LATER AT 1000 FT AGL, APU FIRE HANDLE AND FIRE WARNING WITH BELL CAME ON. APU FIRE BOTTLE EXTINGUISHED AND RED FIRE HANDLE STAYED ON. APU WAS NOT RUNNING. FOUND APU FIRE INDICATION HARNESS LOOP PLUGS FAILED. REPLACED SAME AND REPLACED APU FIRE BOTTLE.