# SDR AALA202404087327

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2024
- Submitted: April 8, 2024
- Operation: Air carrier
- Aircraft: [N408AN](https://openairdocs.org/aircraft/N408AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 9083
- Aircraft time: 14,380 hours, 3,927 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- 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/AALA202404087327

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: WHILE PERFORMING OPS TEST OF EMERGENCY LIGHTS ON P.S CHECK FOUND EMERGENCY LIGHT/EMERGENCY POWER SUPPLY UNIT (10WL) FORWARD LEFT AND EXIT SIGNS/EMERGENCY POWER SUPPLY UNIT (10WL) FORWARD LEFT". REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (10WL) (AALA202404085460) AND EMERGENCY POWER SUPPLY UNIT BATTERY.

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