# SDR 2019FA0000113

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2019
- Submitted: April 9, 2019
- Operation: General aviation
- Aircraft: [N6042Z](https://openairdocs.org/aircraft/N6042Z), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Engine: Lyc IO360L2A
- Engine time: 750 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 05K21104
- Condition: Unknown
- Location: Engine
- Part time: 750 hours
- Stage of operation: UK
- How discovered: O
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2019FA0000113

## Discrepancy

INTERMITTENT "HUNG VALVE CONDITION" ON THE EXHAUST SIDE OF (2) FACTORY NEW CYLINDERS P/N 05K21104 WITH 750 HRS TSN. CONDITION CAUSING ROUGH RUNNING ENGINE ON OCCASION.

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