# SDR AWXA200400574

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2004
- Submitted: May 26, 2004
- Operation: Air carrier
- Aircraft: N621AW
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 053
- Aircraft time: 47,258 hours, 21,448 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 321454
- Part serial: 0721
- Condition: Faulty
- Location: Zone 241
- Part time: 20,210 hours, 8,039 cycles
- 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/AWXA200400574

## Discrepancy

DEN - EEL - DURING 4 DAY CHECK THE EMERGENCY LIGHT SYSTEM FAILED TEST.  MAINTENANCE REMOVED AND REPLACED LT OVERWING EMERGENCY POWER SUPPLY UNIT (11WL), OPERATIONAL CHECK WAS GOOD.

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