As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENGINE SHUTDOWN, THE APU FIRE A-LIGHT ILLUMINATED. FIRE BOTTLES DISCHARGED. INSPECTION OF APU AND APU COMPARTMENT REVEALED NO EVIDENCE OF A FIRE. CLEANED AREA AND APU GROUND RUN AND TESTED OK. FIRE EXTINGUISHER AND SQUIB WERE REPLACED. INSPECTED FIRE LOOP 'A' AND ASSOCIATED WIRING. FOUND AND REPAIRED CHAFED WIRES.