# SDR IKBR2021072200030

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2021
- Submitted: July 22, 2021
- Operation: General aviation
- Filed by: [The Ohio State University Airport, repair station IKBR028F](https://openairdocs.org/faa-repair-station/IKBR028F/the-ohio-state-university-airport.md) (OpenAirDocs)
- Aircraft: [N210SU](https://openairdocs.org/aircraft/N210SU), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S12431
- Aircraft time: 710 hours
- System (JASC): [2437 · DC Indicating System](https://openairdocs.org/jasc/2437)
- Part: Interface Unit
- Part number: 0110368200
- Part serial: 497003704
- Condition: Defective
- Location: Zone 100
- Part time: 710 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IKBR2021072200030

## Discrepancy

ALTERNATOR SYSTEM WAS SHOWING A DISCHARGE ON THE GARMIN G1000 DISPLAY DESPITE THE ALTERNATOR AND ALTERNATOR CONTROL UNIT FUNCTIONING PROPERLY.  AFTER TROUBLESHOOTING IT WAS DETERMINED THAT THE GARMIN GEA71B (P/N 011-03682-0, S/N 497003704) AIRFRAME INTERFACE WAS THE PROBLEM.  REPLACING IT WITH NEW P/N 011-03682-00, S/N 497006150 CORRECTED THE PROBLEM.

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