# SDR QR9R2023032200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2023
- Submitted: March 22, 2023
- 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: 18724239809
- Aircraft time: 2,744 hours
- System (JASC): [6730 · Rotorcraft Servo System](https://openairdocs.org/jasc/6730)
- Part: Actuator
- Part number: B673M40A1002
- Part serial: 10100
- Condition: Illuminated
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2023032200001

## Discrepancy

DURING FLIGHT THE ACTUATOR MASTER CAUTION ILLUMINATED. AIRCRAFT STARTED TO EXPERIENCE HEADING/TRIM ANOMALIES. FLIGHT CONTROLS ALSO BECAME INCREASINGLY SLUGGISH. DURING TEST FLIGHT EVAL, 35 MINUTES INTO FLIGHT, ACTUATOR ILLUMINATED ON CAD. PFD DISPLAYED A YAW AMBER INDICATION. AFTER LANDING, AP TEST WAS CONDUCTED AND AP1 AND AP2 FAILED TEST WITH YAW ACTUATOR ALONG WITH YAW SAS FAILING. REMOVED AND REPLACED T/R ACTUATOR IAW AMM 67-34-00, 4-1. TEST FLIGHT SUCCESSFULLY COMPLETED.

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