# SDR A6WA201140961

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2011
- Submitted: November 18, 2011
- Operation: Air carrier
- Aircraft: [N420AW](https://openairdocs.org/aircraft/N420AW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7640
- Aircraft time: 22,558 hours, 21,357 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Priority Valve
- Part number: 46193
- Part serial: 1283B
- Condition: Failed
- Location: Landing Gear
- Part time: 22,558 hours, 21,357 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/A6WA201140961

## Discrepancy

GEAR DISAGREE WARNING AFTER TAKE OFF.  NR 1 AND 2 HYD NORMAL, NR 3 HYD HAD 90 PERCENT AND 3200 PSI.  LOUD THUMPING AND SHAKING.  ALL RETURNED TO NORMAL ONCE GEAR DOWN IAW QRH.  R & R LANDING GEAR PRIORITY VALVE.

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