# SDR UALA2010042601385

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2010
- Submitted: May 5, 2010
- Operation: Air carrier
- Aircraft: [N799UA](https://openairdocs.org/aircraft/N799UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26926
- Aircraft time: 52,903 hours, 7,764 cycles
- Engine: Pwa PW4090
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Isolation Valve
- Part number: 32908144
- Condition: Faulty
- Location: Apu Bleed Sys
- Stage of operation: CL
- 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/UALA2010042601385

## Discrepancy

APU BLEED ISOLATION VALVE FAILED AT DEPARTURE.  REPLACED FAULTY APU SURGE CONTROL VALVE. CKS GOOD, NO MSG DISPLAYED.

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