# SDR F3LA202604060396

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2026
- Submitted: April 6, 2026
- Operation: Air carrier
- Aircraft: [N721FR](https://openairdocs.org/aircraft/N721FR), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 07884
- Aircraft time: 24,252 hours, 10,666 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: Failed
- 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/F3LA202604060396

## Discrepancy

NR 1 EPSU BATTERY (11WL) FAILED TEST, AC WAS NOT GROUNDED.   SCHEDULED RON HEAVY CHECK. REMOVED AND REPLACED EPSU BATTERY (11WL) IAW AMM 33-51-38-000-002-A/33-51-38-400-002-A. OPS CHECKED GOOD. AIRCRAFT WAS RETURNED TO SERVICE.

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