# SDR SWAA117203

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2011
- Submitted: October 19, 2011
- Operation: Air carrier
- Aircraft: N419WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29824
- Aircraft time: 35,016 hours, 20,160 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 849589
- Part serial: MX630349
- Condition: Faulty
- Location: Nr 1 Engine
- 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/SWAA117203

## Discrepancy

AIR TURNBACK - IN-FLIGHT NR 1 ENGINE A HYDRAULIC PUMP LOW PRESSURE LIGHT ILLUMINATED.  REMOVED AND REPLACED NR 1 ENGINE DRIVEN HYDRAULIC PUMP, NR 1 ENGINE EDP HYDRAULIC SHUTOFF VALVE, CASE HYDRAULIC FILTER AND RETURN FITTING PER MM.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.