# SDR QR9R2026090300002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2026
- Submitted: September 3, 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: 9726
- Aircraft time: 4,271 hours
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Gcu
- Part number: 51530022
- Part serial: P5233CA
- Condition: Failed
- Location: Nr 2 Generator
- Stage of operation: AP
- How discovered: V
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2026090300002

## Discrepancy

ON APPROACH, GEN DISCON ON CAD AND GEN AMPS DROPPED TO 0.0 ON SYSTEM #2. TROUBLESHOOTING CONFIRMED THE #2 GCU TO BE BAD. REMOVED AND REPLACED GCU IAW AMM 24-30-00, 4-1; MOC SUCCESSFULLY COMPLETED.

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