# SDR UPS06548739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2006
- Submitted: December 8, 2006
- Operation: Air carrier
- Aircraft: [N459UP](https://openairdocs.org/aircraft/N459UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25480
- System (JASC): [2917 · Hydraulic Pressure Regulator, Main](https://openairdocs.org/jasc/2917)
- Part: Pressure Switch
- Condition: Failed
- Location: Hydraulic Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS06548739

## Discrepancy

INSPECTION TYPE:N/A ATB - AFTER DEPARTURE THE CREW EXPERIENCED A HYD SYS PUMP FAILURE.  THE A/C RETURNED TO SDF.  NO EMERGENCY WAS DECLARED, AND THE A/C LANDED WITHOUT FURTHER INCIDENT.  TROUBLESHOT THE LEFT PRESSURE SWITCH PER FIM.  REMOVED & REPLACED LEFT HYD PRESS SWITCH IN REFERENCE TO MM 29-11-18-4.  NO LEAK NOTED.  OK FOR SERVICE.

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