# SDR QR9R2026093000002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 2026
- Submitted: September 30, 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: 9824
- Aircraft time: 3,899 hours
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Unit
- Part number: B315M5007051
- Part serial: LE1437
- Condition: Malfunctioned
- 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/QR9R2026093000002

## Discrepancy

UNKNOWN MALFUNCTION 1 MASTER CAUTION (RIGHT SIDE) WITH NO INDICATION ON CAD. AIRBUS RESET DONE WITH SOME RESULT UPON LEVELING OFF AT ALTITUDE. A TESTFLIGHT EVAL FOUND RIGHT HAND MASTER CAUTION LIGHT BEGAN FLASHING AFTER ABOUT 10 MIN GROUND RUN AT FLIGHT IDLE. MASTER CAUTION COULD NOT BE RESET. NO ACCOMPANYING CAUTION OR WARNING MESSAGE ON CAD. FLASHING RIGHT HAND MASTER CAUTION COULD BE RESET WHEN TWIST GRIPS WERE BROUGHT TO GROUND IDLE. REMOVED AND REPLACED WARNING UNIT ASSEMBLY IAW AMM 31-50-00, 4-1.

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