# SDR 9JLA2021100726186

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2021
- Submitted: October 7, 2021
- Operation: Air carrier
- Aircraft: N910SD
- Make and model: Amd FALCON900B
- Aircraft serial: 172
- Aircraft time: 6,396 hours, 2,455 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Relay
- Part number: 01APP32043RT25M3
- Condition: Defective
- Location: Efis
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2021100726186

## Discrepancy

THE MAINTENANCE TEAM REPORTED THE CO-PILOT AVIONICS NOT TURNING OFF WITH MASTER SWITCH. THE MAINTENANCE TEAM TROUBLESHOT AND VERIFIED THAT THE COPILOTS EFIS RELAY WAS DEFECTIVE. THE RELAY WAS REMOVED AND REPLACED WITH A NEW RELAY. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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