# SDR 2023FA0000601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2023
- Submitted: October 17, 2023
- Operation: General aviation
- Aircraft: [N654SA](https://openairdocs.org/aircraft/N654SA), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 13830
- Aircraft time: 912 hours
- Engine: Lyc IO540AE1A5
- Engine time: 912 hours
- System (JASC): [7820 · Engine Noise Suppressor](https://openairdocs.org/jasc/7820)
- Part: Muffler
- Part number: C16938
- Part serial: NA
- Condition: Distorted
- Location: Engine Bay
- Part time: 462 hours
- Component: Exhaust Assy, Robsin
- Component part number: C16937
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000601

## Discrepancy

EXHAUST SYSTEM HEAT DEFORMING. NEW MUFFLER SYSTEM INSTALLED @ 449.94 THEN AGAIN @912.12.

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