# SDR DALA2026082504822

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2026
- Submitted: August 25, 2026
- Operation: Air carrier
- Aircraft: [N378NW](https://openairdocs.org/aircraft/N378NW), registered now
- Make and model: Airbus A320-211
- Registry model: [Airbus A320-211](https://openairdocs.org/model/airbus-industrie-a320-211) (OpenAirDocs)
- Aircraft serial: 2092
- Aircraft time: 63,798 hours, 32,115 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MF100511
- Part serial: 06700
- Condition: Leaking
- Location: Zone 200
- Part time: 37,701 hours, 19,196 cycles
- 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/DALA2026082504822

## Discrepancy

LEAK ON SECOND OBSERVER CREW OXYGEN MASK AT COCKPIT.  REMOVED SECOND OBSERVER CREW OXYGEN MASK P/N: MF10-05-11, S/N: 06700 ON UNSERVICEABLE CONDITION AT COCKPIT AS PER A320 FAM AMM 35-12-41-000-002-A. JOB IN PROGRESS. REPLACED SECOND OBSERVER CREW OXYGEN MASK (5760HM) P/N: MF10-05- 11, S/N: 06700 ON UNSERVICEABLE CONDITION BY NEW CREW OXYGEN MASKP/N: MF10-05-11, S/N: 103234 ON SERVICEABLE CONDITION AT COCKPIT AS PER A320 FAM AMM 35-12-41-000-002-A AND A320 FAM AMM35-12-41-400-002-A. (LP: 1751247, AIRCRAFT WAS GROUNDED)

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