# SDR SWAA2018050121459

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2018
- Submitted: May 1, 2018
- Operation: Air carrier
- Aircraft: N776WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 30591
- Aircraft time: 62,814 hours, 366,805 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: O-Ring
- Part number: NAS16128
- Condition: Leaking
- Location: Hyd Pump
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2018050121459

## Discrepancy

AIR TURNBACK DUE TO LOSS OF THE  HYD SYSTEM -A-  PRESSURE.   FOUND THE 1 HYDRAULIC PUMP HAD LEAKED AROUND PRESSURE LINE.  R & R THE O-RING IAW AMM.

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