# SDR AALA2020071879014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2020
- Submitted: July 18, 2020
- Operation: Air carrier
- Aircraft: [N151AN](https://openairdocs.org/aircraft/N151AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6840
- Aircraft time: 14,712 hours, 5,668 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 321431
- Condition: Discharged
- Location: Emergency Lights
- 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/AALA2020071879014

## Discrepancy

AIRCRAFT NOT GROUNDED - EMERGENCY LIGHTS INOP, EPSU (EMERGENCY POWER SUPPLY UNIT) BATTERY PACKS DISCHARGED.  REMOVED AND REPLACED EPSU BATTERY PACK, 10WL (AALA202007179014) AND 13WL (AALA202007179017) PER AMM 33-51-38, EPSU TEST CHECKS GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.