# SDR MTNA20211012001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2021
- Submitted: October 13, 2021
- Operation: Air carrier
- Aircraft: [N820FX](https://openairdocs.org/aircraft/N820FX), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 248
- Aircraft time: 38,900 hours, 34,889 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cockpit
- Stage of operation: CR
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MTNA20211012001

## Discrepancy

REPORTED EXHAUST SMELL IN COCKPIT. RAN ENGINES FOR 50 MINUTES AND COULD NOT DUPLICATE EXHAUST SMELL IN COCKPIT.  REMOVED AND REPLACED #2 PROP HUB ASSEMBLY O-RING WITH SERVICEABLE O-RING. OPS AND LEAK CHECK GOOD.

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