# SDR FDEA201110034271

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2011
- Submitted: October 10, 2011
- Operation: Air carrier
- Aircraft: [N621FE](https://openairdocs.org/aircraft/N621FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48792
- Aircraft time: 41,734 hours, 9,608 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Coupling
- Condition: Cracked
- Location: Hyd Line
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201110034271

## Discrepancy

AFTER T/O "NR1 HYD LOW" ALERT APPEARED WITH FLUID DECREASING THEN HYD FAIL ALERT IN NR1.  FLUID QUANTITY INDICATED 0.  FOUND CRACKED UNION NR 1 HYD RETURN LINE, PERFORMED REPAIR IAW AMM 20-10-01.   REMOVED AND REPLACED NR 1 ENGINE MANIFOLD FILTERS IAW MM 29-12-41-2.  REPLACED NR 1 ENGINE LEFT AND RIGHT HYDRAULIC PUMPS IAW MM 29-11-20-4-2.   SERVICED HYDRAULIC SYSTEM IAW MM 29-11-20.  BOTH HYDRAULIC PUMPS, FILTER MANIFOLD AND SLAT REPAIR LEAK CHECKED GOOD. INSTALLED SLAT PANEL IAW MM 57-40-01-4. OK FOR SERVICE.

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