# SDR 2020F00343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2020
- Submitted: July 21, 2020
- Operation: General aviation
- Aircraft: [N440SF](https://openairdocs.org/aircraft/N440SF), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9457
- Aircraft time: 4,722 hours, 13,938 cycles
- System (JASC): [6340 · Rotor Drive Indicating System](https://openairdocs.org/jasc/6340)
- Part: Indicator
- Part number: B771M40C1005
- Part serial: 112
- Condition: Inoperative
- Location: Low Rotor
- Part time: 4,722 hours, 13,938 cycles
- Stage of operation: HO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020F00343

## Discrepancy

AIRCRAFT WAS PULLED INTO A HOVER AND THE LOW ROTOR WARNING SOUNDED AND THE ROTOR RPM READ ZERO. AIRCRAFT LANDED AND FLIGHT WAS CANCELLED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.