# SDR HYIA201808031001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2018
- Submitted: August 23, 2018
- Operation: Air carrier
- Aircraft: [N7037E](https://openairdocs.org/aircraft/N7037E), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: C4020471
- Aircraft time: 35,532 hours
- System (JASC): [3310 · Flight Compartment Lighting](https://openairdocs.org/jasc/3310)
- Part: Dimmer
- Part number: 51184241
- Condition: Failed
- Location: Instrument Light
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA201808031001

## Discrepancy

DURING CLIMB OUT, THE CAPTAIN'S FLIGHT INSTRUMENT ILLUMINATION FAILED. SHORTLY AFTER,  SMELLED A BURNING ELECTRICAL AND LIGHT SMOKE. MAINTENANCE INSPECTED AND FOUND THE INSTRUMENT LIGHT DIMMER ASSEMBLY AT FAULT. REPLACED THE DIMMER AND TRANSISTOR Q4 WITH NO FURTHER DEFECTS NOTED.

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