# SDR NB089003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2008
- Submitted: March 28, 2008
- Operation: Air carrier
- Aircraft: [N143DK](https://openairdocs.org/aircraft/N143DK), registered now
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL309
- Aircraft time: 2,048 hours, 1,944 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire Harness
- Condition: Chafed
- Location: Cockpit
- Part time: 2,048 hours, 1,944 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NB089003

## Discrepancy

WHEN THE PILOT WAS DOING A PREFLIGHT THE COCKPIT LIGHTING SYSTEM WAS TURNED ON, SMOKE AND FUMES COULD BE SEEN COMING FROM THE COPILOTS EDGE LIGHTED C/B PANEL.  POWER WAS TURNED OFF AND INVESTIGATION REVEALED ONE OF THE BRASS TRIM SCREWS THAT ATTACHES THE EDGE LIGHTED PANEL TO THE COCKPIT SIDE WALL WAS CHAFING THROUGH A POWER WIRE BEHIND THE PANEL.  THIS CAUSED THE SCREW TO GET HOT AND BURN THE LIGHTED PANEL ASSEMBLY P/N 90-364125-3.

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