As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE APU WARNING ON TAXI IN RAN NON-NORMAL CHECKLIST. DEACTIVATED THE APU AND REMOVED THE APU EXHAUST DUCT IAW EA-4849A025 PART 1 & AMM 49-11-01. INSPECTIONS COMPLETED NO FURTHER FINDINGS. REMOVED AND REPLACED THE DAMAGED APU AND APU EXHAUST DUCT CLAMP AND REINSTALL THE APU DUCT IAW EA-4849A025 PART 2, AMM 49-81-01. REPLACED APU FIRE BOTTLE & OPS TESTED NORMAL IAW AMM 26-22-01.