# SDR 2007UALA00596

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2007
- Submitted: March 2, 2007
- Operation: Air carrier
- Aircraft: [N795UA](https://openairdocs.org/aircraft/N795UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26927
- Aircraft time: 40,993 hours, 6,248 cycles
- Engine: Pwa PW4090
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Warning System
- Condition: Activated
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007UALA00596

## Discrepancy

STATUS MSG -APU-, BUT APU NEVER SHUT DOWN.  REBOOTED ACFT, BUT NO HELP.  AFTER TROUBLESHOOTING, DETERMINED THAT APU FIRE-OVERHEAT DETECTOR CARD WAS FAULTY.  REPLACED CARD & APU OPERATED OK FOR SERVICE.  SUSPECT DISTURBED CIRCUIT PATH ON CARD.

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