# SDR USAASA03146

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2003
- Submitted: February 5, 2004
- Operation: Air carrier
- Aircraft: [N174US](https://openairdocs.org/aircraft/N174US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1492
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145510
- Condition: Failed
- Location: Emergency Light
- 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/USAASA03146

## Discrepancy

LAX - DURING THE EMERGENCY LIGHT TEST, THE MID, RIGHT, FORWARD TEST OF THE EMERGENCY LIGHTING SYSTEM FAILED.  MAINTENANCE REPLACED THE RIGHT MID FORWARD EMERGENCY POWER SUPPLY UNIT.  OPERATIONLLY CHECKS OK.  (M)

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