# SDR AU510001548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2005
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Engine: Ge CFM56*
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Bearing
- Part number: 21830
- Condition: Failed
- Location: Hydraulic Pump
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU510001548

## Discrepancy

HYDRAULIC SYSTEM `B` NR 1 ELECTRIC HYDRAULIC PUMP FAILED.  NIL PRESSURE AND METAL CONTAMINATION.  INVESTIGATION FOUND THE FAILURE WAS DUE TO FAILURE OF THE PRE-MOD SB 57186-29-291 TRUNNION NEEDLE BEARING P/N 21830.

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