# SDR SWAA991442

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N657SW
- Make and model: Boeing 737-3L9
- Registry model: [Boeing 737-3L9](https://openairdocs.org/model/boeing-737-3l9) (OpenAirDocs)
- Aircraft serial: 23331
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hyd Sys
- Part number: 3810056106
- Condition: Reqd Service
- Location: Lower Mid Fuse
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA991442

## Discrepancy

HYD LOW PRESSURE A-SYSTEM INDICATON, QTY DECREASED TO 1/4 FULL.  PREVIOUSLY REMOVED AND REPLACED NR 1 ENG T/R ISOLATION VALVE AND SUSPECT AIR IN SYSTEM.  SERVICED HYD A-SYSTEM, ACTUATED FLIGHT CONTROLS AND NR 1 ENG T/R.  ALL INDICATIONS CHECKED GOOD.

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