# SDR AALA202112276114

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2021
- Submitted: December 27, 2021
- Operation: Air carrier
- Aircraft: [N103NN](https://openairdocs.org/aircraft/N103NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5884
- Aircraft time: 26,230 hours, 5,335 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 321431
- 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/AALA202112276114

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: EMERGENCY LIGHT OPERATIONAL TEST FAILED AS PER PS CHECK STEP 27, MESSAGE: BATTERY/EMERGENCY POWER SUPPLY UNIT (14WL) MID RIGHT. REMOVED AND REPLACED 14WL ON MID GALLEY RIGHT HAND SIDE BATTERY PACK ON EMERGENCY POWER SUPPLY UNIT AS PER AMM 33-51-38.

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