# SDR QR9R2023071200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 12, 2023
- Submitted: July 12, 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: 18724189803
- Aircraft time: 3,210 hours
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Actuator
- Part number: 41800879001
- Part serial: 787
- Condition: Misrepaired
- Location: Yaw Damper
- Part time: 3,132 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2023071200001

## Discrepancy

YAW TRIM ACTUATOR RECEIVED WITH BOLT HOLE MIS-DRILLED, SCRATCHES ON THE CASING IN MULTIPLE LOCATIONS, AND THE SPHERICAL BEARING HAS WEAR AND EXCESSIVE BUILDUP OF MATERIAL IN THE RACE.

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