# SDR CA021016020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2002
- Submitted: October 28, 2002
- Operation: General aviation
- Make and model: Snias AS350B
- Aircraft time: 5,804 hours
- Engine: Tmeca ARRIEL1B
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tach Generator
- Part number: 0177555170
- Condition: Failed
- Location: Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021016020

## Discrepancy

(CAN) FAILURE OF THE TACH BOX CAUSED THE BLEED VALVE TO CLOSE ON ENGINE START-UP, STALLING THE COMPRESSOR.START WAS ABORTED. PART REPLACED WITH AIRWORTHY TACH BOX.

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