# SDR WRNA201200002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2012
- Submitted: April 16, 2012
- Operation: Air carrier
- Aircraft: N950AR
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48461
- Aircraft time: 67,905 hours, 15,486 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: NAS1611228
- Condition: Cut
- Location: Hydraulic Sys
- Component: Filter Module
- Component part number: ASG05275001
- 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/WRNA201200002

## Discrepancy

DURING CRUISE HYD 3 ELEV "OFF" LIGHT ON.  HYD QTY CHECKED 4.2 GAL AND KEPT ON DROPPING TO BELOW 2.5 GALS.  HYD 3 FAIL.  DIVERTED TO VCP, LANDING NORMAL.  MX FOUND O-RING CUT ON HYD FILTER MODULE.  REMOVED AND REPLACED O-RING IAW 20-40-02.  SERVICED NR 3 HYD IAW 12-13-02, RUN UP AND LEAK CHECK GOOD IAW 29-00-00 PG 216.  A/C RELEASED FOR SERVICE.

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