# SDR SWAA031736

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2003
- Submitted: August 13, 2003
- Operation: Air carrier
- Aircraft: [N505SW](https://openairdocs.org/aircraft/N505SW), registered now
- Make and model: Boeing 737-5H4
- Registry model: [Boeing 737-5H4](https://openairdocs.org/model/boeing-737-5h4) (OpenAirDocs)
- Aircraft serial: 24182
- Aircraft time: 43,428 hours, 43,251 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 623337
- Part serial: MX551367
- Condition: Faulty
- Location: Nr 1 Engine Hyd
- Stage of operation: CL
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA031736

## Discrepancy

AIR TURNBACK, ON GEAR RETRACT 'A' SYSTEM HYD PUMP LIGHTS AND MASTER CAUTION LIGHTS ILLUMINATED, 'A' SYSTEM HYD PRESS DROPPED TO 1000 PSI.  REMOVED AND REPLACED ENGINE DRIVEN HYD PUMP 'A' AND CASE DRAIN FILTER PER MM.

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