# SDR UALA2011120506675

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2011
- Submitted: January 3, 2012
- Operation: Air carrier
- Aircraft: [N677UA](https://openairdocs.org/aircraft/N677UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30029
- Aircraft time: 37,702 hours, 9,390 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Pressure Switch
- Part number: 211C223211
- Part serial: Y02797A
- Condition: Failed
- Location: Hyd System
- Stage of operation: CR
- 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/UALA2011120506675

## Discrepancy

LEFT HYDRAULIC PRIMARY PUMP AND RUDDER RATIO EICAS CAME ON INTERMITTENTLY DURING FLIGHT AT FL 380-400.  REPLACED EDP PRESSURE SWITCH, S26, OPERATIONAL CHECKED GOOD WITH ENGINE RUN.  ENG CHECK GOOD.

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