# SDR QR9R20211029004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2021
- Submitted: October 29, 2021
- 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: 19724639857
- Aircraft time: 606 hours
- System (JASC): [6321 · Main Rotor Brake](https://openairdocs.org/jasc/6321)
- Part: Switch
- Part number: MS252531
- Part serial: UNK
- Condition: Faulty
- Stage of operation: IN
- How discovered: V
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20211029004

## Discrepancy

ACFT RESTRICTED FROM ROTOR BRAKE USE DUE TO ROTOR BRAKE CAUTION DOES NOT ILLUMINATE ON CAD WHEN BRAKE IS ENGAGED. REPLACED MICRO-SWITCH (IPC: 63-51-10-01-420); MOC OK.

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