# SDR 2015FA0000294

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2015
- Submitted: June 29, 2015
- Operation: General aviation
- Aircraft: [N820PM](https://openairdocs.org/aircraft/N820PM), registered now
- Make and model: Urocop EC120B
- Registry model: [Urocop EC120B](https://openairdocs.org/model/eurocopter-ec120b) (OpenAirDocs)
- Aircraft serial: 1686
- Aircraft time: 200 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Pressure Switch
- Part number: 7050A3632180
- Part serial: 38037
- Condition: Chafed
- Location: Main Gearbox
- Part time: 200 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2015FA0000294

## Discrepancy

MAIN GEAR BOX PRESSURE SWITCH CAUSING FALSE READING, LIGHT TO ILLUMINATE.  FURTHER RESEARCH SHOWS THAT CAUSE WAS INTERNAL WIRE CHAFING.

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