# SDR AALA2020081439014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2020
- Submitted: August 14, 2020
- Operation: Air carrier
- Aircraft: [N996AN](https://openairdocs.org/aircraft/N996AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7310
- Aircraft time: 11,198 hours, 4,253 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: AD321431
- Condition: Inoperative
- Location: Emergency Lights
- 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/AALA2020081439014

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: PERFORMED OPERATIONAL TEST OF THE EMERGENCY LIGHTS PER TASK CARD 26L00005062 AND MAINTENANCE MESSAGE BAT/ESPUSU (15WL) ATA 335100 POPS UP. TROUBLESHOOT FAULT IAW TSM. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERIES PER AMM 33-51-38 AND TASK CARD 26L0005062.

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