As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FIRE WARNING OFF/AGENT, BOTTLES DISCHARGED. REPLACING FIRE BOTTLES, FOUND APU SURGE VALVE DUCT CLAMP AND BOOT BLOWN OFF. HOT SURGE AIR CAUSED FIRE INDICATION. REPLACED BOOT AND LEAK CHECKED. REPLACED FIRE BOTTLES. A/C RETURNED TO SERVICE.