# SDR YENA2024041600613

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2024
- Submitted: April 16, 2024
- Operation: Air carrier
- Aircraft: [N994JL](https://openairdocs.org/aircraft/N994JL), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 08185
- Aircraft time: 21,968 hours, 7,035 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: UNKNOWN
- 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/YENA2024041600613

## Discrepancy

DURING HEAVY MAINTENANCE: DURING EPSU BITE, FOUND 15WL BAT FAULT; REMOVED AND REPLACED EPSU BATTERY 15WL IAW AMM 33-51-38-100-200-A/400-200A-A. BITE TEST OK. REF STS NR WO 3329 N0413.

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