# SDR QR9R2026060400001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2026
- Submitted: June 5, 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: 9815
- Aircraft time: 3,715 hours
- System (JASC): [6340 · Rotor Drive Indicating System](https://openairdocs.org/jasc/6340)
- Part: Indicator
- Part number: B771M40C1005
- Part serial: 212
- Condition: Stuck
- Location: Triple Tach
- Stage of operation: TX
- 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/QR9R2026060400001

## Discrepancy

TRIPLE TACH WOULD NOT MOVE AT IDLE DURING START RUN-UP. REMOVED AND REPLACED TRIPLE TACH IAW AMM 62-41-00, 4-3; MOC SUCCESSFULLY COMPLETED.

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