# SDR 2026FA0000167

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2026
- Submitted: March 10, 2026
- Operation: General aviation
- Aircraft: [N212BS](https://openairdocs.org/aircraft/N212BS), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S8243
- Aircraft time: 15,370 hours
- Engine: Lyc IO360L2A
- Engine time: 1,070 hours
- Propeller: Mcauly 1A170E
- System (JASC): [7100 · Powerplant System](https://openairdocs.org/jasc/7100)
- Part: Cylinder Head
- Part number: SL36006WA20P
- Part serial: 366000017282
- Condition: Cracked
- Location: Engine
- Stage of operation: TX
- How discovered: V
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000167

## Discrepancy

ENGINE WAS REPORTED RUNNING ROUGH, WAS FOUND TO HAVE A CRACK ON THE CYLINDER HEAD ON #4 CYLINDER. THE SAME PROBLEM WAS FOUND ON ANOTHER ENGINE, SAME TYPE AIRCRAFT, ENGINE AND CYLINDER.

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