# SDR CA130719004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Robsin R44RAVENII
- Aircraft time: 3,416 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [6240 · Main Rotor Indicating System](https://openairdocs.org/jasc/6240)
- Part: Tachometer
- Part number: C7924
- Condition: Binding
- Location: Main Rotor
- Part time: 1,348 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA130719004

## Discrepancy

(CAN) DURING GROUND RUN FOLLOWING 50 HOUR INSPECTION THE DUAL TACH WAS FOUND TO BE STICKING ON START-UP.  DUAL TACH REPLACED.

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