# SDR FDEA201608273055

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 2016
- Submitted: August 30, 2016
- Operation: Air carrier
- Aircraft: [N521FE](https://openairdocs.org/aircraft/N521FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48478
- Aircraft time: 78,001 hours, 13,863 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Control Valve
- Part number: AJG70415545
- Part serial: EFS25443
- Condition: Leaking
- Location: Hydraulic Sys
- Part time: 24,460 hours, 6,231 cycles
- Stage of operation: DE
- 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/FDEA201608273055

## Discrepancy

AT TOP OF DESCENT RECEIVED A LEVEL ONE HYD 3 ELEVATOR OFF ALERT. FLUID DECREASED TO 1.2 AT SHUTDOWN. USED NORMAL GEAR EXTENSION, NORMAL TAXI IN AND NORMAL   HYDRAULIC TEMPERTURE OF 37 DEGREES C.  FOUND O-RING EXTENDED OUT OF NR 3 STABILIZER TRIM CONTROL UPPER MODULE PRESSURE LINE.  R & R PRIMARY TRIM CONTROL VALVE.  OPS AND LEAK CHECKS GOOD.

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