# SDR MALA100129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2010
- Submitted: September 14, 2010
- Operation: Air carrier
- Aircraft: N423XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B423
- Aircraft time: 28,355 hours, 31,750 cycles
- Engine: Ge CT79B
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- 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/MALA100129

## Discrepancy

EMERGENCY LIGHT BATTERY PACK FOR 21LN FAILED OPS TEST. REPLACED EMER LIGHT POWER SUPPLY 21LN (PN: 3301-51, SN OFF: 1358) IAW AMM 33-50-10.  OPS TEST GOOD.

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