# SDR DALA2026071104071

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2026
- Submitted: July 11, 2026
- Operation: Air carrier
- Aircraft: [N521DT](https://openairdocs.org/aircraft/N521DT), 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: 11082
- Aircraft time: 15,988 hours, 3,932 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Faulted
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026071104071

## Discrepancy

DURING SVC. EPSU BAT (17WL) FAULT ON CIDS.   REPLACED 17WL BATTERY PER A321 AMM 33-51. FUNCTION TEST AND BITE TEST PASS. NO FAULTS. (LP 8765908 - AIRCRAFT WAS GROUNDED)

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