# SDR AALA202610132734

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2026
- Submitted: October 14, 2026
- Operation: Air carrier
- Aircraft: [N417AN](https://openairdocs.org/aircraft/N417AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 9537
- Aircraft time: 22,316 hours, 6,037 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- 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/AALA202610132734

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: WHILE ACCOMPLISHING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST, RECEIVED MESSAGE BATTTERY/EMERGENCY POWER SUPPLY UNIT (13WL) AFT LEFT. ATTEMPTED AFT BATTERY RESET, NO HELP. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY 13WL AFT LEFT PER AMM 33-51-38. OPS CHECK GOOD.

---
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.