# SDR YV3R2021022200433

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2021
- Submitted: February 22, 2021
- Operation: General aviation
- Aircraft: [N72SL](https://openairdocs.org/aircraft/N72SL), registered now
- Make and model: Robsin R44
- Aircraft serial: 1394
- Aircraft time: 2,978 hours
- Engine: Lyc O540F1B5
- System (JASC): [6240 · Main Rotor Indicating System](https://openairdocs.org/jasc/6240)
- Part: Dual Tachometer
- Part number: C7924
- Part serial: 4423
- Condition: Defective
- 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/YV3R2021022200433

## Discrepancy

CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY PN: C792-4 ROTOR NEEDLE WAS INOPERATIVE.

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