# SDR 2022FA0000655

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2022
- Submitted: October 28, 2022
- Operation: General aviation
- Aircraft: [N340SF](https://openairdocs.org/aircraft/N340SF), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9411
- Aircraft time: 6,466 hours
- System (JASC): [6540 · Tail Rotor Drive Indicating System](https://openairdocs.org/jasc/6540)
- Part: Tachometer
- Part number: NDC1230
- Part serial: 482
- Condition: Failed
- Location: Main Rotor
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000655

## Discrepancy

1&2 NP AND ROTOR RPM INDICATOR (TRIPLE TAC) WAS INOP DURING THE START SEQUENCE.

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