# SDR QR9R2024060300001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2024
- Submitted: June 3, 2024
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 11722179490
- Aircraft time: 4,420 hours
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Gcu
- Part number: 51530022
- Part serial: P5245CA
- Condition: Warning Message
- Location: Nr 2 Generator
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2024060300001

## Discrepancy

GEN DISCON SYS 2 CAUTION APPEARED IN FLIGHT. TROUBLESHOT IAW THE CHECKLIST, BUT CAUTION REMAINED. GEN AMPS ON #2 WAS READING 0 AFTER NOTICING CAUTION AND REMAINED AT 0 THROUGHOUT TROUBLESHOOT AND SHUTDOWN. AFTER SWAPPING GCU'S, THE PROBLEM FOLLOWED TO THE #1 SIDE. REMOVED AND REPLACED GENERATOR CONTROL UNIT IAW AMM 24-30-00, 4-1. MOC SUCCESSFULLY COMPLETED, NO FAULTS/LEAKS NOTED.

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