# SDR MALA090078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2009
- Submitted: June 3, 2009
- Operation: Air carrier
- Aircraft: N439XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B439
- Aircraft time: 25,047 hours, 27,597 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Failed
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA090078

## Discrepancy

DURING OPS CHECK OF EMERGENCY LIGHT SYSTEM BATTERY PACKS AT 21LN AND 23LN FAILED CAPACITY CHECK.  REMOVED AND REPLACED EMERGENCY PWR SUPPLY 21LN & 23LN.

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