# SDR SWAA101687

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2010
- Submitted: March 26, 2010
- Operation: Air carrier
- Aircraft: [N331SW](https://openairdocs.org/aircraft/N331SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 23695
- Aircraft time: 71,560 hours, 64,370 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire
- Part number: W3660092D
- Condition: Damaged
- Location: Cockpit
- Stage of operation: LD
- How discovered: O
- Nature of condition: B
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA101687

## Discrepancy

AIR TURNBACK / DECLARED EMERGENCY.  FUMES IN THE COCKPIT.  FOUND DAMAGED WIRING AT LEFT I/B LANDING LIGHT SWITCH.  REPLACED LANDING LIGHT SWITCH AND TERMINAL ENDS.

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