# SDR DALA2026073004417

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2026
- Submitted: July 31, 2026
- Operation: Air carrier
- Aircraft: [N333NB](https://openairdocs.org/aircraft/N333NB), registered now
- Make and model: Airbus A319-114
- Registry model: [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114) (OpenAirDocs)
- Aircraft serial: 1582
- Aircraft time: 65,582 hours, 34,403 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Box
- Condition: Inoperative
- 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/DALA2026073004417

## Discrepancy

OBSERVER SEAT INOP DUE TO O2 BOX WONT TEST.  DEFERRED TO MEL 25-11-06C PLACARD INSTALLED NO (M) PROCEDURES. PERFORMED OPS TEST ON OXYGEN MASK. TEST GOOD. REPACKED OBSERVER O2 MASK. TESTED GOOD. REMOVED FROM MEL, PLACARD REMOVED, NO "M" PROCEDURES. ALL WORK DONE IAW AMM 35-12. (LP: 9087654, AIRCRAFT WAS GROUNDED)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.