# SDR USAA20090925SB153

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2009
- Submitted: September 25, 2009
- Operation: Air carrier
- Aircraft: N154AW
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- Aircraft serial: 23776
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 20121
- Condition: Faulty
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA20090925SB153

## Discrepancy

MAINTENANCE REPORTED THE AFT LT EMERGENCY LIGHTS ILLUMINATE AFTER POWER IS SHUT DOWN.  MAINTENANCE REMOVED AND REPLACED THE AFT LT EMERGENCY LIGHT BATTERY CHARGER/POWER SUPPLY PER MM 33-51-51-962-016.  OPERATIONAL CHECK GOOD.

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