# SDR UIEA2025070500834

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2025
- Submitted: July 9, 2025
- Operation: Air carrier
- Aircraft: [N863GT](https://openairdocs.org/aircraft/N863GT), registered now
- Make and model: Boeing 747-8F
- Registry model: [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f) (OpenAirDocs)
- Aircraft serial: 67150
- Aircraft time: 10,938 hours, 1,647 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Exhaust Duct
- Condition: Disconnected
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2025070500834

## Discrepancy

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.

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