# SDR OG5R2015FA0000200

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2015
- Submitted: May 13, 2015
- Operation: General aviation
- Aircraft: [N539ND](https://openairdocs.org/aircraft/N539ND), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S10850
- Aircraft time: 5,383 hours
- Engine: Lyc IO360L2A
- Engine time: 6,328 hours
- Propeller: Mcauly 1A170E
- System (JASC): [7820 · Engine Noise Suppressor](https://openairdocs.org/jasc/7820)
- Part: Muffler
- Part number: A175400125
- Part serial: 38179
- Condition: Failed
- Location: Exhaust
- Part time: 212 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/OG5R2015FA0000200

## Discrepancy

DURING FLIGHT CARBON MONOXIDE WARNING ILLUMINATED.  PILOT RETURNED TO LAND.  MAINTENANCE DISCOVERED 2 SPOTWELDS ON THE SHROUD SUPPORT FLANGE OF THE MUFFLER HAD FAILED RESULTING IN OPEN HOLES IN THE MUFFLER CAN. REPLACED MUFFLER WITH NEW UNIT.

---
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.