# SDR DALA2019010300036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2019
- Submitted: January 4, 2019
- Operation: Air carrier
- Aircraft: [N847DN](https://openairdocs.org/aircraft/N847DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31958
- Aircraft time: 11,011 hours, 4,262 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Box
- Condition: Faulty
- Location: Cockpit
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2019010300036

## Discrepancy

SHIP 3847 OBSERVERS O2 MASK NOT TRANSMITTING. CORECTIVE ACTION: R&R OBSERVER'S 02 MASK BOX IN REF WITH AMM 35-12. OPS CHECK GOOD. (5171500).

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