# SDR 2012FA0000501

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2012
- Submitted: July 20, 2012
- Operation: General aviation
- Aircraft: N4107A
- Make and model: Diamon DA20-C1
- Registry model: [Diamon DA20-C1](https://openairdocs.org/model/diamond-aircraft-ind-da20-c1) (OpenAirDocs)
- Aircraft serial: C0495
- Engine: Cont IO240B
- Propeller: Snsnch W69EK63
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Sticking
- Location: Nr 1 Cylinder
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000501

## Discrepancy

ACFT ON A TRAINING FLIGHT.  A REPORT WAS MADE THAT THE ENGINE WAS RUNNING ROUGH AND IT FELT LIKE IT WAS RUNNING ON 3 CYLINDERS.  DECLARED AN EMERGENCY, DIVERTED MADE AN UNEVENTFUL LANDING.   AN INSPECTION PERFORMED BY MECHANICS VERIFIED A VALVE WAS STICKING INTERMITTENTLY.  CYLINDER WAS REPLACEDT.

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