# SDR 2008UALA05693

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2008
- Submitted: September 22, 2008
- Operation: Air carrier
- Aircraft: [N771UA](https://openairdocs.org/aircraft/N771UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26932
- Aircraft time: 51,025 hours, 9,747 cycles
- Engine: Pwa PW4077
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Control Valve
- Part number: 3930007102
- Part serial: 235
- Condition: Failed
- Location: Nr 1 Slat
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA05693

## Discrepancy

NR 1 SLATS PRIMARY FAIL UPPER EICAS.  *S/D*  SLAT PRIMARY CONTROL VALVE FAILURE.  REPLACED SLAT PRIMARY CONTROL VALVE & SVC'D CENTER HYD RESERVOIR.  A/C OK FOR SERVICE.

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