# SDR 2009F00031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2009
- Submitted: April 24, 2009
- Operation: Air carrier
- Filed by: [Chronos Aviation, LLC., repair station E81R759X](https://openairdocs.org/faa-repair-station/E81R759X/chronos-aviation-llc.md) (OpenAirDocs)
- Aircraft: N356SR
- Make and model: Braero HS125700A
- Aircraft serial: NA0318
- Aircraft time: 11,067 hours, 8,205 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 60030451
- Part serial: 32310
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2009F00031

## Discrepancy

EMERGENCY LIGHTING SYS WOULD NOT OPERATE DURING FUNCTIONAL TESTS AS PART OF A SCHEDULED AIRFRAME INSP.  FOUND FWD POWER SUPPLY UNIT TO HAVE FAILED INTERNALLY. REPLACED POWER SUPPLY, SYSTEM TESTS NORMAL.

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