# SDR 2012FA0000779

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 27, 2012
- Submitted: November 27, 2012
- Operation: General aviation
- Aircraft: [N56RF](https://openairdocs.org/aircraft/N56RF), registered now
- Make and model: Dhav DHC6300
- Aircraft serial: 788
- Engine: Pwa PT6A27
- Propeller: Hartzl HCB3TN3
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Oil Ring
- Part number: M259661928
- Condition: Leaking
- Location: Fuel Filter
- Component: Fuel Filter
- Component part number: 02532310101
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000779

## Discrepancy

NEWLY INSTALLED FUEL FILTER O-RINGS LEAK CHECK OK DURING GROUND OPERATION, BUT BEGIN TO LEAK AFTER ABOUT AN HOUR FLIGHT TIME. WHEN THE SAME PN M25966/1-928 IS UTILIZED BY ANOTHER MFG, UTILIZING AN ASTM STANDARD FVMQ VS. THE PRECIX O-RING WITH A SPECIFICATION OF: AMS-R-25988. THE LEAK NO LONGER OCCURS.

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