# SDR QR9R20220311001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2022
- Submitted: March 11, 2022
- 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: 07720319165
- Aircraft time: 1,956 hours
- System (JASC): [6730 · Rotorcraft Servo System](https://openairdocs.org/jasc/6730)
- Part: Actuator
- Part number: B673M40A1001
- Part serial: 00192
- Condition: Failed
- Stage of operation: HO
- How discovered: V
- Nature of condition: G
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20220311001

## Discrepancy

AIRCRAFT FAILED AP TEST. TF MOC FOUND AP TEST FAILED WITH "Y" CAUT ON PFD AND AP1 / AP2 TRIM CAUTIONS ON CAD. HYD TEST PERFORMED DURING RUNUP FOUND PEDALS TO BE TIGHT WHEN TESTING SYSTEM #2. TAIL ROTOR ACTUATOR FAILED CONTROL FORCES TEST WITH A MEAN MEASUREMENT OF 3.8 LBF (LIMIT 2.7LBF). REPLACED T/R ACTUATOR IAW AMM 67-34-00, 4-1.

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