# SDR CA091229003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2009
- Submitted: January 19, 2010
- Operation: General aviation
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft time: 47,981 hours
- Engine: Rroyce RB211535E4
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pressure Switch
- Part number: 211C223327
- Condition: Defective
- Location: Hyd Pump
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA091229003

## Discrepancy

(CAN) IN CRUISE, EICAS MESSAGE ANNUNCIATION "LT ENG HYD PUMP".  IN-FLIGHT TURNBACK INITIATED TO YYZ FOR COMPANY CONVENIENCE.  THE LEFT ENGINE HYDRAULIC PUMP PRESSURE SWITCH WAS FOUND DEFECTIVE.  (TC NR 20091229003)

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