# SDR 2022F00516

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2022
- Submitted: December 15, 2022
- Operation: General aviation
- Aircraft: [N157SG](https://openairdocs.org/aircraft/N157SG), registered now
- Make and model: Cessna 340CESSNA
- Aircraft serial: 3400154
- Aircraft time: 5,862 hours
- Engine: Cont TSIO520NB
- Engine time: 436 hours
- Propeller: Mcauly 3AF32C*
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tach Generator
- Part number: MS250382
- Part serial: 119424
- Condition: Seized
- Location: Left
- Stage of operation: CR
- How discovered: O
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022F00516

## Discrepancy

THE LH TACH GENERATOR SEIZED INTERNALLY CAUSING THE LH TACHOMETER INDICATION TO FALL TO ZERO.

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