# SDR UALA2009123104080

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2009
- Submitted: December 31, 2009
- Operation: Air carrier
- Aircraft: [N647UA](https://openairdocs.org/aircraft/N647UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25284
- Aircraft time: 76,751 hours, 12,465 cycles
- Engine: Pwa PW4060
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Pressure Switch
- Part number: 38760483
- Part serial: 375
- Condition: Failed
- Location: Generator
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009123104080

## Discrepancy

APU FAULTED AND AUTO SHUTDOWN TWICE.  APU IS INOPERATIVE.  REPLACED GENERATOR FILTER DIFFERENTIAL PRESSURE SWITCH.  OP CHECKS NORMAL.

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