# SDR GTIA2025092539091

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2025
- Submitted: September 25, 2025
- Operation: Air carrier
- Aircraft: [N983NK](https://openairdocs.org/aircraft/N983NK), registered now
- Make and model: Airbus A320-271N
- Registry model: [Airbus A320-271N](https://openairdocs.org/model/airbus-a320-271n) (OpenAirDocs)
- Aircraft serial: 11511
- Aircraft time: 7,488 hours, 3,328 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 321431
- Part serial: 107845
- Condition: Inoperative
- Location: Zone 200
- Part time: 5,153 hours, 2,284 cycles
- 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/GTIA2025092539091

## Discrepancy

( EPSU BATTERY ) MULTIPLE EMERGENCY EXIT SIGNS NOT ILLUMINATE WHEN ON BATTERIES POWER. -R/R FRONT ( 10WL ) AND MID LEFT ( 11WL ) EPSU BATTERIES IAW AMM 33-51-00. ALL OPS CHECKS NORMAL.

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