# SDR DALA2025072405578

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2025
- Submitted: July 24, 2025
- Operation: Air carrier
- Aircraft: [N571DZ](https://openairdocs.org/aircraft/N571DZ), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0064
- Aircraft time: 23,784 hours, 4,323 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Condition: No Test
- Location: Zone 200
- 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/DALA2025072405578

## Discrepancy

NRC 200-026. MTC TASK - DURING OPS CHECK OF EMERGENCY LIGHTING, FOUND DR2L EXTERIOR EMERGENCY LIGHT(151WL21) NOT ILLUMINATED. DR2L EVACUATION AREA LIGHT UNIT FIN: 151WL21 REMOVED AND REPLACED IAW AMM A350-A-52-12-73. INSTALLATION TEST CARRIED OUT AS PER AMM A350-52-12-73-A4001-720A-A. FOUND SATISFACTORY. (LP# 1096225)

---
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.