# SDR UALA2009091102873

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2009
- Submitted: September 17, 2009
- Operation: Air carrier
- Aircraft: [N794UA](https://openairdocs.org/aircraft/N794UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26953
- Aircraft time: 53,643 hours, 7,817 cycles
- Engine: Pwa PW40903
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Spline
- Condition: Sheared
- Location: Hyd Pump
- Component: Pump
- Component part number: S271W1114
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009091102873

## Discrepancy

CENTER ADP C2 INOP PRIOR TO DEPARTURE.  TESTED TRANSDUCER & FOUND NOT AT FAULT.  FOUND C2 HYDRAULIC PUMP SHEARED SPLINE.  REPLACED UNIT.  OPS CHECK NORMAL.

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