# SDR YV3R2021020300429

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2021
- Submitted: February 3, 2021
- Operation: General aviation
- Aircraft: S2-AI
- Make and model: Robsin R66
- Aircraft serial: 0857
- Aircraft time: 512 hours
- Engine: Rroyce AE3007A1
- System (JASC): [6240 · Main Rotor Indicating System](https://openairdocs.org/jasc/6240)
- Part: Dual Tachometer
- Part number: F7921
- Part serial: 1150E
- Condition: Defective
- Part time: 1 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YV3R2021020300429

## Discrepancy

CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: F792-1 ROTOR RPM NEEDLE WAS ERRATIC.

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