# SDR IPXA2026070613325

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2026
- Submitted: July 6, 2026
- Operation: Air carrier
- Aircraft: [N355UP](https://openairdocs.org/aircraft/N355UP), registered now
- Make and model: Boeing 767-34AF
- Registry model: [Boeing 767-34AF](https://openairdocs.org/model/boeing-767-34af) (OpenAirDocs)
- Aircraft serial: 37863
- Aircraft time: 31,475 hours, 11,681 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- 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/IPXA2026070613325

## Discrepancy

OBSERVERS OXYGEN MASK DOES NOT FLOW WHEN EMERGENCY BUTTON IS PUSHED.  REMOVED AND REPLACED OBSERVER`S OXYGEN MASK IAW AMM 35-11-51. OPS CHKD GOOD.

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