# SDR 9JLA03503

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 25, 2011
- Submitted: June 6, 2011
- Operation: Air carrier
- Aircraft: N803JL
- Make and model: Raythn HAWKER800
- Aircraft serial: 258160
- Aircraft time: 11,710 hours, 7,376 cycles
- System (JASC): [2915 · Hydraulic Pressure Relief Valve, Main](https://openairdocs.org/jasc/2915)
- Part: Pressure Switch
- Part number: 151854SN1
- Part serial: 6080TW
- Condition: Defective
- Location: Hydraulic Sys
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA03503

## Discrepancy

THE FLIGHT CREW REPORTED THE "HYD 1 LO PRESS" ILLUMINATED AFTER THE FINAL FLAP SETTING AND REMAINED ON.  TROUBLESHOOTING FOUND THE NR 1 HYD PRESSURE SWITCH P/N 15185-4SN1 TO BE DEFECTIVE.  A NEW SWITCH WAS INSTALLED, FUNCTIONAL CHECKS SATISFACTORY.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.