# SDR YENA2026032400332

- 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: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2026032400332

## Discrepancy

DURING HEAVY MAINTENANCE: EPSU 15WL MID L BATTERY FAILED BITE TEST; REMOVED & REPLACED 15WL EPSU BATTERY IAW A321 AMM 33-51-38 & PERFORMED EPSU SYSTEM BITETEST IAWA321 AMM 33-51-00-710-001 & CIDS 1 INTERFACE & POER UP TEST IAW A321 AMM 23-73-00-740-005-6 TESTS OK REF STS W004320 N 0383 ,

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