# SDR DJFA20120126010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2012
- Submitted: February 3, 2012
- Operation: Air carrier
- Aircraft: [N905FL](https://openairdocs.org/aircraft/N905FL), registered now
- Make and model: Emb EMB-135BJ
- Registry model: [EMB EMB-135BJ](https://openairdocs.org/model/embraer-emb-135bj) (OpenAirDocs)
- Aircraft serial: 145775
- Aircraft time: 8,705 hours, 4,752 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire
- Condition: Burned
- Location: Lavatory Lights
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DJFA20120126010

## Discrepancy

DURING TROUBLESHOOTING OF A PILOT DISCREPANCY FOR THE LAV VANITY LIGHTS INOPERATIVE, MAINTENANCE TECHNICIANS FOUND WIRING THAT APPEARS TO HAVE BURNED THROUGH NEAR AN OXYGEN LINE IN THE PSU.  ADDITIONALLY, 2 LIGHTING INVERTERS WERE FOUND FAILED.  THE BURNED WIRING WAS LOCATED NEAR THE LIGHTING POWER SUPPLIES WHICH HAVE A HISTORY OF RUNNING HOT AND BURNING WIRES IN THE OVERHEAD PSU.  THE WIRING WAS REPLACED AND ROUTED FURTHER FROM THE POWER SUPPLIES.

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