# SDR AALA202005139001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2020
- Submitted: May 13, 2020
- Operation: Air carrier
- Aircraft: [N129AA](https://openairdocs.org/aircraft/N129AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6401
- Aircraft time: 19,494 hours, 5,304 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 321431
- Condition: Faulty
- Location: Cabin
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202005139001

## Discrepancy

AIRCRAFT NOT GROUNDED - CIDS (CABIN INTERCOMM DATA SYSTEM) 1 EPSU (EMERGENCY POWER SUPPLY UNIT) 15WL MID L FAULT . REPLACED BATTERY PACK IN 15WL EPSU PER AMM 33-51-38, OPERATIONAL CHECK GOOD.

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