# SDR FDEA202201030005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2022
- Submitted: January 5, 2022
- Operation: Air carrier
- Aircraft: [N592FE](https://openairdocs.org/aircraft/N592FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48550
- Aircraft time: 88,436 hours, 20,074 cycles
- System (JASC): [2760 · Drag Control System](https://openairdocs.org/jasc/2760)
- Part: Servo Valve
- Part number: AYG70915507
- Part serial: AQ0113
- Condition: Leaking
- Location: Rt Spoiler
- Part time: 62,905 hours, 16,119 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202201030005

## Discrepancy

#1 HYD SYS QTY READING ZERO.  ALL INDICATIONS WERE NORMAL UNTIL FLAPS WERE DROPPED, THEN SYS #1 HYD QTY RAPIDLY   DROPPED TO ZERO.   R/H SPOILER DRIVE SERVO VALVE LEAKING OUT OF COMPONENT. REPLACED SPOILER SERVO   DRIVE ACTUATOR. LEAK CHECKS GOOD

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