# SDR 3GMA20130515004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2013
- Submitted: May 17, 2013
- Operation: Air carrier
- Aircraft: [N481LF](https://openairdocs.org/aircraft/N481LF), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9392
- Aircraft time: 802 hours
- Engine: Tmeca ARRIEL1E2
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tachometer
- Part number: B771M40C1003
- Part serial: 00658
- Condition: Inoperative
- Location: Instrument Panel
- Stage of operation: TX
- How discovered: 9
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/3GMA20130515004

## Discrepancy

DURING SYSTEM CHECK, AFTER STARTING NR 1 ENGINE, NO ROTOR TACH WAS INDICATED WITH ROTORS TURNING.

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