# SDR A6YA2010052738221

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2014
- Submitted: May 27, 2014
- Operation: Air carrier
- Aircraft: [N8257H](https://openairdocs.org/aircraft/N8257H), registered now
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH1650
- Aircraft time: 5,910 hours
- Engine: Cont IO550C
- Engine time: 670 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston Ring
- Part number: 648005
- Condition: Flaking
- Location: Lt Engine
- Part time: 670 hours
- Component: Piston, Cont
- Component part number: 654857
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/A6YA2010052738221

## Discrepancy

DURING AN OIL CHANGE FLAKES OF METAL WERE FOUND IN THE OIL FILTER.  THE TOP SPARK PLUGS WERE REMOVED & CYLINDER NR 3 HAD OIL ON THE TOP SPARK PLUG.  THE CYLINDER WAS REMOVED & PLATING WAS FOUND TO BE FLAKING OFF THE TOP PISTON RING.  ALL 6 CYLINDERS WERE REMOVED & ALL TOP RINGS HAD PLATING STARTING TO FLAKE OFF TO SOME DEGREE.  ALL CYLINDERS, PISTONS & RINGS HAVE BEEN SENT TO THE MANUFACTURE FOR INSPECTION & REPAIR.

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