# SDR 2023FA0000226

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2022
- Submitted: April 19, 2023
- Operation: General aviation
- Aircraft: [N350SU](https://openairdocs.org/aircraft/N350SU), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S12304
- Aircraft time: 1,653 hours
- Engine: Lyc IO360L2A
- Engine time: 1,653 hours
- Propeller: Mcauly 1A170E
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder Head
- Part number: LW12427
- Part serial: UNK
- Condition: Unknown
- Location: #2, #4
- Part time: 1,653 hours
- Component: Engine, Lyc, IO360L2A
- Component part number: IO360L2A
- Stage of operation: CL
- How discovered: O
- Nature of condition: R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000226

## Discrepancy

INTERMITTENT HESITATION DURING CLIMB. HIGH POWER SETTING. ENGINE CYLINDERS #2 AND #4 WERE REMOVED AND SENT TO THE OVERHAUL SHOP POPLAR GROVE FOR REPAIRS. BOTH EXHAUST VALVES WERE STICKING. CYLINDER SHOP REAMED VALVES. THIS CORRECTED THE ENGINE HESITATION ISSUE.

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