# SDR EVCA201711131

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 11, 2017
- Submitted: November 13, 2017
- Operation: Air carrier
- Aircraft: [N192AE](https://openairdocs.org/aircraft/N192AE), registered now
- Make and model: Bell 206L-1
- Registry model: [Bell 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1) (OpenAirDocs)
- Aircraft serial: 45660
- Aircraft time: 21,367 hours, 48,215 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Tach Generator
- Part number: 206375202101
- Part serial: 624
- Condition: Failed
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EVCA201711131

## Discrepancy

DURING FLIGHT PILOT LOST HYDRAULIC POWER TO FLIGHT CONTROLS AND PERFORMED AN UNPLANNED LANDING AT AN AIRPORT. DURING MAINTENANCE INVESTIGATION IT WAS FOUND THAT THE SPLINES IN THE TACHOMETER GENERATOR DRIVE THAT DRIVE THE SHAFT FOR THE HYDRAULIC PUMP HAD FAILED.

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