# SDR P5CA9700555

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N850FT](https://openairdocs.org/aircraft/N850FT), registered now
- Make and model: Boeing 747122
- Aircraft serial: 19755
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Transfer Valve
- Part number: 78014
- Condition: Leaking
- Location: Rudder
- Stage of operation: CR
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA9700555

## Discrepancy

ON CLIMBOUT, NR 3 HYDRAULIC QUANTITY WENT TO 0.  SYSTEM SHUTDOWN AS PER ABNORMAL CHECK LIST.  FOUND UPPER RUDDER TRANSFER VALVE LEAKING FROM VALVE ITSELF.  REPLACED VALVE ASSEMBLY,  LEAK CHECKED AND OPERATIONAL CHECKED PER 27-21-16.

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