# SDR DALA2026010600104

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2026
- Submitted: January 6, 2026
- Operation: Air carrier
- Aircraft: [N529DN](https://openairdocs.org/aircraft/N529DN), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0735
- Aircraft time: 2,587 hours, 205 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Faulted
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026010600104

## Discrepancy

AFTER LANDING DISPATCH MESSAGE "CABIN EMER EXIT LIGHT". FAULT CODE 3350F00Q PERFORMED RESET OF CIDS1,2 & BITE TEST OF EPSU, STILL NO HELP. RE RACKED BATTERY PACK (102WL2) OF EPSU, TEST OK. MSG CLEARED PER TSM A350-A-33-51-XX-07001-412A-A & AMM A350-A-25-23-66-01ZZZ-520Z-A. (LP# 8399756)

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