# SDR UPS06648528

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2006
- Submitted: November 10, 2006
- Operation: Air carrier
- Aircraft: [N308UP](https://openairdocs.org/aircraft/N308UP), registered now
- Make and model: Boeing 767-34AF
- Registry model: [Boeing 767-34AF](https://openairdocs.org/model/boeing-767-34af) (OpenAirDocs)
- Aircraft serial: 27761
- System (JASC): [2215 · Autopilot Main Servo](https://openairdocs.org/jasc/2215)
- Part: Servo Valve
- Condition: Malfunctioned
- Location: Rt Yaw Damper
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS06648528

## Discrepancy

REROUTE, LEFT HYD QTY DECREASING FROM 0.95 BLK OUT TO 0.69. SEE PREVIOUS WRITEUPS 478839 & 478841.  REMOVED AND REPLACED ELECTROHYDRAULIC SERVO VALVE ON RT YAW DAMP SERVO IAW MM 22-21-03-2.  OPS CKS AND LEAK CKS GOOD.  SERVICED LEFT HYD SYS TO FULL.

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