# SDR DALA2018021200852

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2018
- Submitted: February 12, 2018
- Operation: Air carrier
- Aircraft: [N557NW](https://openairdocs.org/aircraft/N557NW), registered now
- Make and model: Boeing 757251
- Aircraft serial: 33393
- Aircraft time: 45,519 hours, 19,932 cycles
- System (JASC): [2932 · Hydraulic Pressure Sensor](https://openairdocs.org/jasc/2932)
- Part: Pressure Switch
- Condition: Failed
- Location: Hyd System
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018021200852

## Discrepancy

ABORTED TAKEOFF AT 50 KNOTS DUE TO A LT ENG HYD PUMP FAILURE.  REPLACED THE NR 1 ENGINE LOW PRESSURE SWITCH IAW AMM 29-31.  OP CHECKED OK.

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