# SDR DALA2021120707556

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 6, 2021
- Submitted: December 7, 2021
- Operation: Air carrier
- Aircraft: [N403DX](https://openairdocs.org/aircraft/N403DX), registered now
- Make and model: Airbus A330-941
- Registry model: [Airbus A330-941](https://openairdocs.org/model/airbus-a330-941) (OpenAirDocs)
- Aircraft serial: 1931
- Aircraft time: 8,015 hours, 920 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: None
- Condition: None
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021120707556

## Discrepancy

SHIP 3403 DURING EPSU TEST FOUND EPSU 19WL INOP. CORRECTIVE ACTION: REPLACED 19WL EPSU PER AMM 33-25. (8430276)

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