# SDR 95ZZZZ130

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N224TH
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B224
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Valve
- Part number: HP848930621
- Condition: Failed
- Location: Landing Gear
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZZ130

## Discrepancy

MAINTENANCE NOTED THAT WHEN BATTERIES WERE TURNED ON THAT THE HYDRAULIC PUMP STARTED TO CYCLE EVERY 10-15 SECONDS.  FURTHER TROUBLESHOOTING REVEALED THAT THE LANDING GEAR CONTROL VALVE HAD FAILED INTERNALLY.  THE VALVE WAS REPLACED AND A FUNCTIONAL CHECK OF THE SYSTEM PERFORMED WITH ALL INDICATIONS NORMAL AND NO LEAKS NOTED.  (Z)

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