# SDR YV3R2020052000264

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2020
- Submitted: May 20, 2020
- Operation: General aviation
- Aircraft: [N63BK](https://openairdocs.org/aircraft/N63BK), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 12602
- Aircraft time: 307 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [6240 · Main Rotor Indicating System](https://openairdocs.org/jasc/6240)
- Part: Tachometer
- Part number: C7924
- Part serial: 2704
- Condition: Erratic
- Part time: 306 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YV3R2020052000264

## Discrepancy

CUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 MAIN ROTOR RPM NEEDLE WAS ERRATIC.

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