# SDR DALA2026042202596

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2026
- Submitted: April 22, 2026
- Operation: Air carrier
- Aircraft: [N502DN](https://openairdocs.org/aircraft/N502DN), registered now
- Make and model: Airbus A350-941
- Registry model: [Airbus A350-941](https://openairdocs.org/model/airbus-a350-941) (OpenAirDocs)
- Aircraft serial: 0135
- Aircraft time: 36,502 hours, 3,714 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Gen
- Condition: Tripped
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026042202596

## Discrepancy

EA/EO DUE TO INCOMING OPEN UP CHECK FOUND AT DOOR #4L THE CHEMICAL GENERATOR DISCHARGED.  REMOVED AND REPLACED O2 CONTAINERS AS PER A350 AMM A350-A-25-33- 66. PERFORMED OPERATIONAL TEST AS PER WORK CARD 3520-2001. (LP# 1555191)

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