# SDR SWAA102974

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2010
- Submitted: May 21, 2010
- Operation: Air carrier
- Aircraft: [N200WN](https://openairdocs.org/aircraft/N200WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32482
- Aircraft time: 19,836 hours, 11,690 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 887477
- Part serial: MX681669
- Condition: Leaking
- Location: Hydraulic Sys
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA102974

## Discrepancy

DIVERSION / DECLARED EMERGENCY.  THIRTY MINUTES OUT OF BOSTON SYS B HYDRAULIC QUANTITY RAN DOWN TO ZERO, SHORTLY AFTER SYS B ENGINE PUMP WENT LOW PRESSURE.  PER MX REQUEST TURNED OFF ELECTRIC PUMP.  REMOVED AND REPLACED B-SYSTEM ELECTRIC PUMP PER MM.

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