# SDR QR9R2026070800001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2026
- Submitted: July 8, 2026
- 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: 9420
- Aircraft time: 4,522 hours
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Gcu
- Part number: 51530022
- Part serial: P5141CA
- Condition: Failed
- Location: Nr 2 Generator
- Stage of operation: TX
- How discovered: O
- Nature of condition: F
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2026070800001

## Discrepancy

GEN NR 2 DISCONNECT ON THE GROUND DURING STUDENT CHANGE AND COULD NOT BE RESET. BEFORE THE FAILURE, LOAD BALANCE WAS 15 AMPS GEN #1 AND 40 AMPS GEN #2. REMOVED AND REPLACED #2 GCU IAW AMM 24-30-00, 4-1.

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