# SDR HYI2001F00004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2001
- Submitted: November 28, 2001
- Operation: Air carrier
- Aircraft: [N7037E](https://openairdocs.org/aircraft/N7037E), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0471
- Engine: Cont TSIO520*
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Circuit Breaker
- Part number: CM358950
- Condition: Failed
- Location: Avionics
- Stage of operation: NR
- How discovered: O
- Nature of condition: H
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYI2001F00004

## Discrepancy

AVIONIC CIRCUIT BREAKER/SWITCH FAILED IN FLIGHT CAUSING COMPLETE AVIONIC FAILURE CREW UTILIZED EMERGENCY AVIONIC BUS SWITCH AND LANDED WITHOUT INCIDENT. SEVERAL SUCH FAILURES RECORDED RECENTLY. THIS SWITCH HAS A HIGH UTILIZATION FACTOR.(K)

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