# SDR 2025FA0000135

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2025
- Submitted: February 26, 2025
- Operation: General aviation
- Aircraft: [N20SU](https://openairdocs.org/aircraft/N20SU), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11623
- Aircraft time: 5,062 hours
- Engine: Lyc IO360L2A
- Engine time: 314 hours
- Propeller: Mcauly 1A170E
- System (JASC): [7810 · Engine Collector/Tailpipe/Nozzle](https://openairdocs.org/jasc/7810)
- Part: Muffler
- Part number: 99541009
- Condition: Cracked
- Location: Engine
- Part time: 5,062 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000135

## Discrepancy

CREW ALERTED OF CARBON MONOXIDE PRESENT FROM G1000 WARNING. SHUTOFF CABIN HEAT AND OPENED WINDOWS. RETURNED TO BLOCK. VISUAL INSPECTION OF ENGINE MUFFLER FOUND CRACKED.

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