# SDR CALA2026040114988

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N14507](https://openairdocs.org/aircraft/N14507), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11846
- Aircraft time: 5,990 hours, 2,180 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/CALA2026040114988

## Discrepancy

PROCEDURE - CABIN EMERG LIGHT TEST, EPSU TEST FAILED. MESSAGE "EPSU (10WL) FWD L". SEE PHOTO. REPLACED BATTERY OF THE EPSU PER AMM 33-51-38-000-002-A/400-002-A. EPSU BITE TEST PASS. PARTS USED:  18-3351-3-0001, QTY :1

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