# SDR 96UAL900495

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N776UA](https://openairdocs.org/aircraft/N776UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26937
- Engine: Pwa PW4077
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Check Valve
- Part number: S271W8113
- Condition: Galled
- Location: Pylon
- Stage of operation: IN
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900495

## Discrepancy

ENGINE DRIVEN PUMP ON NUMBER 2 ENGINE LEAKING HYDRAULIC FLUID AT PUMP OUTLET.  *S/D*  LEAK WAS AT HYDRAULIC PUMP OUTLINE LINE CHECK VALVE LOCATED IN PYLON.  CHECK VALVE WAS REPLACED.  DEFECTIVE VALVE SENT TO VENDOR FOR FURTHER ANALYSIS.

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