# SDR 2023FA0000201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2023
- Submitted: April 7, 2023
- Operation: General aviation
- Aircraft: [N74808](https://openairdocs.org/aircraft/N74808), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 10974
- Aircraft time: 1,130 hours
- System (JASC): [7800 · Engine Exhaust System](https://openairdocs.org/jasc/7800)
- Part: Muffler
- Part number: C16937
- Condition: Failed
- Location: Engine Area
- Part time: 1,130 hours
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000201

## Discrepancy

CARBON MONOXIDE INDICATION ON ON MAP DISPLAY ON FOREFLIGHT FROM SENTRY PLUS ADS-B RECEIVER.  IMMEDIATELY CAME ON WHEN HEAT WAS PULLED ON. TURNED OFF HEAT, OPENED ALL VENTS AND VERIFIED THE SENTRY RETURNED TO NORMAL. SCHEDULE AN INSPECTION WHICH DISCOVERED A HOLE IN THE EXHAUST.

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