# SDR IPXA2013110800780

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2013
- Submitted: November 8, 2013
- Operation: Air carrier
- Aircraft: [N413UP](https://openairdocs.org/aircraft/N413UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23853
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Switch
- Condition: Defective
- Location: Lh Hyd System
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2013110800780

## Discrepancy

LEFT SYS PRESSURE AND RUDDER RATIO EICAS MESSAGE APPEARED AT 14000' ON CLIMBOUT. CAME ON AND WENT OFF THREE DIFFERENT TIMES WITH NO SYS PRESSURE LIGHT ON LT SYS.  APPEARED A FOURTH TIME A SHORT TIME LATER FOLLOWED BY SYS PRESSURE LIGHT ON LT SYS.     FOUND LT HYD SYS SWITCH S27 DEFECTIVE.  REPLACED SWITCH IAW AMM 29 29-11-17-404-27. OK FOR SERVICE.

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