# SDR AALA202112296331

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2021
- Submitted: December 29, 2021
- Operation: Air carrier
- Aircraft: [N102NN](https://openairdocs.org/aircraft/N102NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5860
- Aircraft time: 26,433 hours, 5,379 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Fault Message
- Location: Zone 200 - Fuse
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202112296331

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: EMERGENCY LIGHTS 2EA INOPERATIVE AT LOWER SEAT PANEL NUMBER 8C. FOUND FAULT CLASS 1 FAULT BATTERY EMERGENCY POWER SUPPLY UNIT (14WL) MID RIGHT. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT AND BATTERY (14WL) PER AMM 33-51-38 BUILT IN TEST EQUIPMENT AND OPERATIONS TEST OK.

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