# SDR UIE2002F00008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2002
- Operation: Air carrier
- Aircraft: [N506MC](https://openairdocs.org/aircraft/N506MC), registered now
- Make and model: Boeing 747-2D3B
- Registry model: [Boeing 747-2D3B](https://openairdocs.org/model/boeing-747-2d3b) (OpenAirDocs)
- Aircraft serial: 21252
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Switch
- Part number: 8906K1563
- Condition: Inoperative
- Location: Wing Ill Lts
- Stage of operation: DE
- Nature of condition: B, J
- Precautionary procedure: G, H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIE2002F00008

## Discrepancy

ON DESCENT A STRONG ELECTRICAL ODOR COMING OUT OF GASPERS.  ELECTRICAL SMOKE OR FIRE CHECK LIST INITIATED.  AFTER ITEM NR 6, SMOKE STOPPED.  AIRCRAFT REMAINED IN THIS CONFIGURATION AND LANDED.  C/A:  FOUND MELTED INSULATION AT WING ILLUMINATION LIGHT SWITCH TERMINAL.  LIGHT INTERMITTENTLY INOPERATIVE,  PULLED CIRCUIT BREAKER.  TRANSFERRED.  REPLACED SWITCH AND WIRE ATTACHED TO TERMINAL NR 1 ON SWITCH FOR THE WING ILLUMINATION LIGHTS IAW MM.

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