# SDR DALA2024040404083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2024
- Submitted: April 4, 2024
- Operation: Air carrier
- Aircraft: [N509DN](https://openairdocs.org/aircraft/N509DN), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0199
- Aircraft time: 26,573 hours, 2,599 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: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2024040404083

## Discrepancy

CABIN EMER EXIT LT DISP. MSG. T/S PER A350-A-33-51-XX-01ZZZ-A EPSU BITE TEST FAULTS EPSU FIN 102WL3. REPLACED EPSU PER A350 AMM 33- 51-32-0001-520A-A/ ALSO INSTALLED PER A350 AMM 33--51-32-0001- 720A-A, PREFORMED BITE PER A350 AMM 33-51-XX-0001-270A-A. ALSO CONFIRMED SOFT WEAR. JOB COMPLETE. (LP# 5253288)

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