# SDR UALA2011101005460

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2011
- Submitted: October 27, 2011
- Operation: Air carrier
- Aircraft: [N782UA](https://openairdocs.org/aircraft/N782UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26948
- Aircraft time: 64,255 hours, 9,304 cycles
- Engine: Pwa PW40903
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Pressure Sensor
- Condition: Failed
- Location: Apu Bleed Sys
- Stage of operation: TX
- 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/UALA2011101005460

## Discrepancy

APU FAILED TO START IN FLT.  SHUTDOWN SHORTLY AFTER REACHING 100 PERCENT.  DIFFERENTIAL PRESSURE SENSOR REPLACED.

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