# SDR 98ZZZX521

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N1691R
- Make and model: Cessna R182
- Registry model: [Cessna R182](https://openairdocs.org/model/cessna-r182) (OpenAirDocs)
- Aircraft serial: R18200516
- System (JASC): [2810 · Fuel Storage](https://openairdocs.org/jasc/2810)
- Part: Drain Valve
- Condition: Leaking
- Location: Lt Wing Fuel
- Stage of operation: IN
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX521

## Discrepancy

LEFT WING FUEL SAMPLE DRAIN VALVE DRIPPING AND THEN REMAINING OPEN.  UPON DISMANTLE, THE O-RING WAS FOUND BROKEN IN 3 PLACES AND SEPARATED INTO 2 PIECES.  THE BROKEN O-RING PIECES LODGED IN THE FORWARD FLOW HOLES AND KEPT THE VALVE STEM OPEN.  UPON MEASUREMENT OF THE VALVE STEM DIAMETER AT THE O-RING POSITION, THE DIAMETER WAS .028 INCH LARGER THAN A VALVE STEM REMOVED EARLIER.

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