# SDR QR9R2026091100001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2026
- Submitted: September 11, 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: 9342
- Aircraft time: 4,991 hours
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 41800876400
- Part serial: 751567
- Condition: Sticking
- Location: Autopilot
- Stage of operation: TO
- 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/QR9R2026091100001

## Discrepancy

ON LIFTOFF, ACTUATOR CAUTION CAME ON. WHEN TRYING TO BUILD BACK UP, THE YAW CAUTION ON THE PFD WAS ILLUMINATED, HOWEVER, AP1/AP2 TURNED ON AS THEY SHOULD. TROUBLESHOOTING DETECTED THE YAW SEMA TO BE STICKING AND RACHETY CAUSING ACTUATOR CAUTION. REMOVED AND REPLACED SEMA ACTUATOR, TEST FLIGHT SUCCESSFULLY COMPLETED.

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