# SDR YENA2019112730682

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2019
- Submitted: November 27, 2019
- Operation: Air carrier
- Aircraft: [N970JB](https://openairdocs.org/aircraft/N970JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7415
- Aircraft time: 12,756 hours, 4,178 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 321431
- Part serial: 811067
- Condition: Failed
- Location: Emergency Lights
- Part time: 4,356 hours, 1,399 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2019112730682

## Discrepancy

DURING HEAVY MAINTENANCE, EPSU'S 11WL AND 12WL LOW VOLTAGE; (REF LHT NR 5200000690-005000941612-0010) REPLACE EPSU BATTERIES (11WL + 12WL) IAW A321 AMM 33-51-38-400-002-A. OPS CHECK 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.