# SDR MALA040530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2004
- Submitted: August 16, 2004
- Operation: Air carrier
- Aircraft: N421XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B421
- Aircraft time: 17,121 hours, 18,718 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 501122804
- Part serial: 2142
- Condition: Inoperative
- Location: Emergency Light
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA040530

## Discrepancy

EMERGENCY POWER LIGHT ILLUMINATED AFTER START.  EMERGENCY POWER SUPPLY P/N 501-1228-04, S/N 2142 UNIT APPEARS TO HAVE BEEN DROPPED.  REPLACED SHORTED A2 PCB P/N 542-2635-01.  UNIT PASSES CMM.  AIRCRAFT RETURNED TO SERVICE 7/29/04.

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