# SDR ULXR201308140002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2013
- Submitted: August 14, 2013
- Operation: General aviation
- Aircraft: [N305FD](https://openairdocs.org/aircraft/N305FD), registered now
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41009
- Aircraft time: 919 hours
- Engine: Pwc PT6C67C
- System (JASC): [7323 · Turbine Governor](https://openairdocs.org/jasc/7323)
- Part: Control Switch
- Condition: Inadequate
- Location: Governor
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ULXR201308140002

## Discrepancy

GOVERNER MANUAL / AUTOMATIC CONTROL SWITCH IS LOCATED ON THE COLLECTIVE CONTROL HEAD. THIS SWITCH IS NEITHER A GUARDED OR LOCKOUT TYPE SWITCH. IT IS EASILY BUMPED INTO THE MANUAL CONTROL MODE. THIS HAS CAUSED SEVERAL MAIN ROTOR OVERSPEED INCIDENTS.THIS SWITCH NEEDS TO BE CHANGED TO A POSITIVE LOCK OR GUARDED SWITCH.

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