# SDR QR9R2023092700001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2023
- Submitted: September 27, 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: 09721259349
- Aircraft time: 3,450 hours
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Sensor
- Part number: 9580115900
- Part serial: NA
- Condition: Failed
- Location: Unknown
- Stage of operation: CR
- How discovered: V
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2023092700001

## Discrepancy

DURING FLIGHT, #1 OVERSPEED SENSOR FAILED. #1 OVERSPEED SENSOR READS OPEN BETWEEN PINS 2 & 3. REMOVED AND REPLACED MAGNETIC SENSOR IAW 80-20-00, 4-1 & 4-3.

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