# SDR DALA2026060803424

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2026
- Submitted: June 8, 2026
- Operation: Air carrier
- Aircraft: [N505DN](https://openairdocs.org/aircraft/N505DN), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0164
- Aircraft time: 38,382 hours, 3,651 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Inoperative
- 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/DALA2026060803424

## Discrepancy

3L BATTERY PACK INOP. FAULT 3350F0002 ON P.F.R. T/S AS PER A350 TSM 33-51-XX-01001- 421A-A, FAULT CONFIRMED. REPLACED EPSU BATTERY 111WL3, TEST PASS . MEL AND PLACARDS REMOVED. (LP# 8052101; AIRCRAFT WAS GROUNDED)

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