# SDR 99ZZZX3274

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N122G](https://openairdocs.org/aircraft/N122G), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500110
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Selector Valve
- Part number: 2710969
- Condition: Failed
- Location: Nlg
- Part time: 9,679 hours
- Component: Parkerhanfin
- Stage of operation: TO
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX3274

## Discrepancy

THE LANDING GEAR CONTROL VALVE FAILED TO RETRACT GEAR.  THIS WAS DISCOVERED WHEN THE CREW SELECTED 'GEAR UP' AFTER TAKEOFF.  THIS IS THE ORIGINAL VALVE INSTALLED IN THE AIRCRAFT AT MANUFACTURER (20 YEARS OLD).

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