# SDR 37CA2025/02/2601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2025
- Submitted: February 26, 2025
- Operation: Air carrier
- Aircraft: [N354LL](https://openairdocs.org/aircraft/N354LL), registered now
- Make and model: Agusta AW119MKII
- Registry model: [Agusta AW119MKII](https://openairdocs.org/model/agustawestland-philadelphia-aw119mkii) (OpenAirDocs)
- Aircraft serial: 14822
- Aircraft time: 5,241 hours, 14,699 cycles
- Engine: Pwa PT6B37A
- Engine time: 3,284 hours, 9,790 cycles
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tach Generator
- Part number: 1090600711
- Part serial: 4957
- Condition: Defective
- Location: Fwd Engine
- Part time: 5,241 hours, 14,699 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/37CA2025%2F02%2F2601

## Discrepancy

N1 TACHOMETER GENERATOR ERRATIC READINGS DURING START UP CAUSING A MIS-COMPARE P CAUTION MESSAGE.

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