# SDR AALA202310091842

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2023
- Submitted: October 9, 2023
- Operation: Air carrier
- Aircraft: [N537UW](https://openairdocs.org/aircraft/N537UW), registered now
- Make and model: Airbus A320*
- Aircraft serial: 4041
- Aircraft time: 43,259 hours, 17,215 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- Condition: Inoperative
- Location: Zone 200 - Fuse
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202310091842

## Discrepancy

AIRCRAFT WAS GROUNDED: AFTER R3 SLIDE CHANGE, EPSU TEST RESULTED IN BAT/EPSU(10WL) FWLL AND EPSU (14WL)MID R. REMOVED AND REPLACED EMERGENCY POWER UNIT (AALA202310093811) AND BATTERY (AALA202310091842) (ON 14WL.

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