# SDR UIEA2020090101894

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2020
- Submitted: September 1, 2020
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 91,638 hours, 15,849 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: False Activation
- Location: Apu Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020090101894

## Discrepancy

APU FIRE IN CRUISE AT FL 400(<P>INSP APU COMPARTMENT NO EVIDENCE OF FIRE, FOUND DEFECTIVE HARNESS, PERFORMED APU FIRE INSP PER AMM 49-11-00-208-029. DEACTIVATED APU & FIRE DETECTION SYSTEM / EXTINGUISHING SYSTEM PER DDG & EO4426A077.</P>)

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