# SDR 2008FA0000089

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2008
- Submitted: February 25, 2008
- Operation: General aviation
- Aircraft: N444MW
- Make and model: Lear 45LEAR
- Aircraft serial: 131
- Engine: Garrtt TFE731*
- System (JASC): [2915 · Hydraulic Pressure Relief Valve, Main](https://openairdocs.org/jasc/2915)
- Part: Pressure Switch
- Part number: 7629001004001
- Condition: Failed
- Location: Hydraulic Sys
- Part time: 2,127 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008FA0000089

## Discrepancy

LT HYDRAULIC PRESSURE SWITCH (S9) FAILED IN FLIGHT, RESULTING IN LOSS OF HYDRAULIC FLUID AND FAILURE OF BOTH LT AND RT HYDRAULIC PUMPS.  NECESSITATED A FLIGHT DIVERSION TO AN ALTERNATE AIRPORT WITH AN EMERGENCY DECLARATION.  (K)

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