# SDR NWAA082236302

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2008
- Submitted: May 19, 2008
- Operation: Air carrier
- Aircraft: N662US
- Make and model: Boeing 747451
- Aircraft serial: 23720
- Aircraft time: 80,498 hours, 10,328 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Condition: Cracked
- Location: Hyd System
- Stage of operation: CR
- 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/NWAA082236302

## Discrepancy

DURING CRUISE, LOST NR 1 HYDRAULIC SYSTEM.  DUMPED 20,000 LBS OF FUEL.  RETURNED TO MSP AND LANDING WAS UNEVENTFUL.  MAINTENANCE REMOVED AND REPLACED NR 1 EDP AND A CRACKED PRESSURE LINE.  LEAK AND PRESSURE CHECKS OK.

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