# SDR SWAA081134

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2008
- Submitted: February 29, 2008
- Operation: Air carrier
- Aircraft: N312SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 23334
- Aircraft time: 72,119 hours, 67,721 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 623337
- Part serial: MX378916
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: NR
- 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/SWAA081134

## Discrepancy

AIR TURNBACK / DECLARED EMERGENCY.  HYDRAULIC "A" SYSTEM FAILED IN FLIGHT.  REMOVED AND REPLACED NR 1 ENGINE HYDRAULIC PUMP AND CASE DRAIN LINE PER MM.

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