# SDR 2026FA0000519

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2026
- Submitted: June 16, 2026
- Operation: General aviation
- Aircraft: [N5251Z](https://openairdocs.org/aircraft/N5251Z), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S10902
- Aircraft time: 11,017 hours
- Engine: Lyc IO360L2A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: SL36006W
- Part serial: 66W000015320
- Condition: Cracked
- Location: Engine
- Part time: 2,598 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000519

## Discrepancy

PILOT REPORTED LOUD NOISE FROM ENGINE, SIGNIFICANT POWER LOSS, AND LOUD VIBRATIONS. PILOT LANDED AT A NEARBY AIRPORT WHERE MANTIENCE DISCOVERED A LARGE CRACK IN CYLINDER #2(HEAD SEPERATING FROM THE BARREL).

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