# SDR 96ZZZX3812

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N43362](https://openairdocs.org/aircraft/N43362), registered now
- Make and model: Piper PA-46-310P
- Registry model: [Piper PA-46-310P](https://openairdocs.org/model/piper-pa-46-310p) (OpenAirDocs)
- Aircraft serial: 468408025
- System (JASC): [3234 · Landing Gear Selector](https://openairdocs.org/jasc/3234)
- Part: O-Ring
- Part number: 752629
- Condition: Ruptured
- Location: Gear Selector
- Component: Garkenyon, 8376702
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX3812

## Discrepancy

DURING A CHECK-FLIGHT, THE EMERGENCY GEAR HANDLE WAS PULLED.  THE GEAR EXTENDED, BUT THE HYDRAULIC POWER PUMP KEPT, AFTER RETRACTION, PUMPING AND CYCLING.  THE CIRCUIT BREAKER WAS PULLED TO KEEP PUMP/MOTOR FROM OVERHEATING.  ON THE GROUND, THE LANDING GEAR RETRACTED, BUT THE PRESSURE WENT DOWN TO 1000-600 PSI.  AFTER REPLACING THE VALVE ASSY, THE SAME THING HAPPENED AFTER AN EMERGENCY EXTENSION.  WHEN THE VALVE ASSY LANDING GEAR SELECTOR WAS DISASSEMBLED, FOUND THE O-RING RUPTURED.  SUBMITTER SUGGESTS TO HAVE THE HOUSING HOLES DEBURRED, A BETTER O-RING, OR EVEN BETTER - A NEW AND BETTER DESIGN.

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