# SDR QR9R2026022700001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2026
- Submitted: February 27, 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: 9424
- Aircraft time: 4,556 hours
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Gcu
- Part number: 51530022
- Part serial: P17532CAA
- Condition: Failed
- Location: Nr 2 Generator
- Stage of operation: TX
- How discovered: V
- Nature of condition: F
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2026022700001

## Discrepancy

GEN 2 DISCONNECT AT IDLE; MAINTENANCE WAS UNABLE TO RESET. A TEST FLIGHT EVAL REVEALED #2 GENERATOR FAILED TO COME ONLINE WITH #2 GEN DISC DISPLAYED ON CAD. #2 GEN AMPS WERE 0 A. BATTERY AMP DISPLAYED +15 A AT START, DROPPED TO 0 A FOR SEVERAL MINUTES THEN CAME BACK ON SEVERAL MINUTES LATER INDICATING +5 A AT SHUTDOWN. REMOVED AND REPLACED #2 GCU.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.