# SDR HYIA20250203001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2025
- Submitted: February 4, 2025
- Operation: Air carrier
- Aircraft: [N2611X](https://openairdocs.org/aircraft/N2611X), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0072
- Aircraft time: 37,620 hours, 43,681 cycles
- System (JASC): [3310 · Flight Compartment Lighting](https://openairdocs.org/jasc/3310)
- Part: Transistor
- Part number: 56180089
- Condition: Burned
- Location: Dimmer
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20250203001

## Discrepancy

PILOT REPORTED A BURNING SMELL IN THE CABIN AFTER TURNING ON INSTRUMENT LIGHTS. MAINTENANCE INSPECTED AND FOUND CO PILOT DIMMING CONTROLLER RESISTOR R1 AND HEAT SINK TRANSISTOR ASSY #7 TRANSISTOR BURNT. REMOVED AND REPLACED RESISTOR AND HEAT SINK ASSY WITH NO ADDITIONAL DEFECTS NOTED.

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