# SDR AALA202406030010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2024
- Submitted: June 3, 2024
- Operation: Air carrier
- Aircraft: [N919US](https://openairdocs.org/aircraft/N919US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6479
- Aircraft time: 29,177 hours, 12,001 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 2146210
- Part serial: 147018
- Condition: Inoperative
- Location: Emergency Lights
- Part time: 29,176 hours, 12,001 cycles
- 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/AALA202406030010

## Discrepancy

AIRCRAFT WAS IN BASE MAINTENANCE: INOPERATIVE EMERGENCY POWER SUPPLY UNIT (12WL) IN PASSENGER CABIN. REPLACED EMERGENCY POWER SUPPLY UNIT (12WL) PER AMM 33-51-38-000-001-A

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