# SDR QR9R2026081300002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2026
- Submitted: August 13, 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: 9774
- Aircraft time: 4,801 hours
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 41800876400
- Part serial: MC3095
- Condition: Failed
- Location: Autopilot
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2026081300002

## Discrepancy

YAW ACTUATOR CAUTION ILLUMINATED IN FLIGHT. MALFUNCTION WAS INDICATED ON THE CAD ONLY. LOWER YAW TRIM LIGHT DID NOT ILLUMINATE. DURING TROUBLESHOOTING, FOUND YAW SEMA BAD, ALSO HAD CODE YAWEMA INVAL. REMOVED AND REPLACED SEMA ACTUATOR IAW AMM 67-20-00, 4-14.

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