# SDR DJFA2009040

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2009
- Submitted: November 9, 2009
- Operation: Air carrier
- Aircraft: [N447LX](https://openairdocs.org/aircraft/N447LX), registered now
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK248
- Aircraft time: 7,821 hours, 6,592 cycles
- System (JASC): [3310 · Flight Compartment Lighting](https://openairdocs.org/jasc/3310)
- Part: Power Supply
- Part number: 86611
- Part serial: 9843119
- Condition: Failed
- Location: Cockpit Lights
- Stage of operation: IN
- How discovered: V
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DJFA2009040

## Discrepancy

ON 11/3/09 CREW REPORTED SMOKE IN THE COCKPIT EMINATING FROM THE ALTITUDE SELECT PANEL DURING PREFLIGHT.  MX CHANGED THE ALTITUDE SELECT PANEL AND OPS CHECKS WERE SATISFACTORY.  ON 11/5/09, THE EVENT REPEATED, ONCE AGAIN OCCURING DURING THE PREFLIGHT CHECKS, MX FOUND THE LIGHTING POWER SUPPLY PRODUCING HIGH VOLTAGE.  THE ALTITUDE SELECT PANEL AND LIGHTING PWR SUPPLY WERE REPLACED.

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