# SDR 2023FA0000371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2023
- Submitted: July 14, 2023
- Operation: General aviation
- Aircraft: [N9096Z](https://openairdocs.org/aircraft/N9096Z), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11086
- Aircraft time: 5,187 hours
- Engine: Lyc IO360L2A
- Engine time: 3,315 hours
- Propeller: Mcauly 1A170E
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: SL36006WA20P
- Part serial: 366W171924778
- Condition: Cracked
- Location: Nr 2
- Part time: 1,017 hours
- Component: Engine, Lyc, IO360L2A
- Component part number: IO360L2A
- Stage of operation: CR
- How discovered: C
- Nature of condition: M
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000371

## Discrepancy

ENGINE CYLINDER #2 CHT VERY HIGH. COMPRESSION CHECK, FOUND CYLINDER #2 CRACKED ABOUT 1/2 UP THE BARREL. VISIBLE FROM FORWARD SIDE. CRACK EXTENDED ALMOST 1/2 WAY AROUND THE BARREL. REMOVED AND REPLACED CYLINDER ASSEMBLY.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.