# SDR HYIA771EA 619

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 19, 2009
- Submitted: June 30, 2009
- Operation: Air carrier
- Aircraft: [N771EA](https://openairdocs.org/aircraft/N771EA), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0046
- Aircraft time: 21,791 hours
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Master Switch
- Part number: CM358950
- Part serial: DATECODE0633
- Condition: Unserviceable
- Location: Lt C/B Switch
- Part time: 2,977 hours
- Stage of operation: NR
- How discovered: V
- Nature of condition: S
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA771EA%20619

## Discrepancy

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

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.