As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FIRE WARNING INDICATION AT 9500 MSL. ACCOMPLISHED IMMEDIATE ACTION ITEM (FIRE BOTTLE DISCHARGED). LIGHT AND BELL WENT OUT IMMEDIATELY. DUMPED FUEL AND RETURNED TO JFK. INSPECTED APU COMPARTMENT FOR EVIDENCE OF FIRE NONE FOUND FIRE WARNING SYSTEM AND APU DIFFERED. REPLACED SWITCH S4 IN M176 APU CONTROL MODULE PER 20-83-11 SWPM, ACCOMPLISHED OPS CHECK IAW 26-15-02 AND 26-15-00.