# SDR AALA202603164069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2026
- Submitted: March 16, 2026
- Operation: Air carrier
- Aircraft: [N104NN](https://openairdocs.org/aircraft/N104NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5895
- Aircraft time: 42,607 hours, 8,580 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- Condition: No Test
- Location: Zone 200
- 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/AALA202603164069

## Discrepancy

AIRCRAFT WAS GROUNDED: BATTERY FAULT MESSAGE FOR EMERGENCY POWER SUPPLY UNIT10WL DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED BATTERY PER TASK CARD 26C00033004 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM WITH NO FAULTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.