# SDR DALA2018060603858

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2018
- Submitted: June 6, 2018
- Operation: Air carrier
- Aircraft: [N811DZ](https://openairdocs.org/aircraft/N811DZ), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31916
- Aircraft time: 16,024 hours, 5,891 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018060603858

## Discrepancy

DURING PREFLIGHT, FIRST OFFICER'S OXYGEN MASK DOES NOT WORK PROPERLY. REMOVED AND REPLACED IAW AMM 35-12. CHECKED OK.

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