# SDR YENA2026032400333

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2026
- Submitted: March 24, 2026
- Operation: Air carrier
- Aircraft: [N975JT](https://openairdocs.org/aircraft/N975JT), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 07520
- Aircraft time: 33,721 hours, 10,713 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Inoperative
- 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/YENA2026032400333

## Discrepancy

DURING HEAVY MAINTENANCE: EPSU 13WL AFT L BAT FAILED TEST; REMOVED & REPLACED 13WL ESPU BATTERY IAW A321 AMM 33-51-38.EPSU BITE TEST DONE. IAW A32AMM 33-51-00-710-001 & CIDS INTERFACE & POWER UP TEST DONE IAW A321 AMM 23-73-00-740-005.TESTS OK REF STS WO 004320 N0382

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