# SDR SA05083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2005
- Submitted: July 14, 2005
- Operation: Air carrier
- Aircraft: [N179UW](https://openairdocs.org/aircraft/N179UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1521
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Condition: Inoperative
- 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/SA05083

## Discrepancy

DURING EMERGENCY LIGHT TEST, GREEN LIGHT WOULD NOT ILLUMINATE ON PROGRAMMING AND TEST PANEL.   MAINTENANCE REPLACED THE LEFT HAND, AFT EMERGENCY POWER SUPPLY UNIT.  OPERATIONALLY CHECKS OK.

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