# SDR MALA100137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2010
- Submitted: September 21, 2010
- Operation: Air carrier
- Aircraft: N450XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B450
- Aircraft time: 25,745 hours, 28,722 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 330151
- Part serial: 2056
- Condition: Failed
- 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/MALA100137

## Discrepancy

DURING TC 335003 POWER SUPPLY 21LN FAILED CAPACITY CHECK. REPLACED POWER SUPPLY 21LN IAW AMM 33-50-10.  PN.  EMERGENCY LIGHTING SYS OPS CHECKS GOOD IAW AMM 33-50-00.

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