# SDR HYIA494BC

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2009
- Submitted: June 30, 2009
- Operation: Air carrier
- Aircraft: [N494BC](https://openairdocs.org/aircraft/N494BC), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0308
- Aircraft time: 23,421 hours
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Master Switch
- Part number: CM358950
- Part serial: DATECODE0717
- Condition: Inoperative
- Location: Lt C/B Panel
- Part time: 719 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA494BC

## Discrepancy

CREW REPORTED AVIONIC MASTER SWITCH INOPERATIVE.  MX REMOVED AND REPLACED SWITCH, AND RETURNED ACFT TO SERVICE.

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