# SDR 2010F00026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2010
- Submitted: February 5, 2010
- Operation: Air carrier
- Aircraft: [N826QS](https://openairdocs.org/aircraft/N826QS), registered now
- Make and model: Cessna 560CESSNA
- Aircraft serial: 5600782
- Aircraft time: 1,000 hours, 863 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Noisy
- Location: Avionics
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2010F00026

## Discrepancy

BUZZING AVIONICS FAN NOISE HEARD AT FL410. NOISE NOT HEARD BELOW 10,000 FEET.

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