# SDR AWXA200400183

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2004
- Submitted: February 18, 2004
- Operation: Air carrier
- Aircraft: N636AW
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 098
- Aircraft time: 45,339 hours, 20,097 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 321454
- Part serial: 1565
- Condition: Faulty
- Location: Zone 221
- Part time: 26,873 hours, 10,779 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/AWXA200400183

## Discrepancy

PHX - EEL - DURING 4-DAY CHECK EMERGENCY LIGHT TEST FAILED FOR MESSAGE 33-51-38 LOAD LT.  MAINTENANCE REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (11WL) ABOVE L-1 DOOR, OPERATIONAL CHECK WAS GOOD.

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