# SDR FDEA201209203362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2012
- Submitted: September 20, 2012
- Operation: Air carrier
- Aircraft: [N257FE](https://openairdocs.org/aircraft/N257FE), registered now
- Make and model: Boeing 727233
- Aircraft serial: 20939
- Aircraft time: 59,104 hours, 37,831 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Condition: Failed
- Location: Second Observer
- Stage of operation: IN
- How discovered: V
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201209203362

## Discrepancy

SECOND OBSERVER OXYGEN MASK FAILED PREFLIGHT CHECK.  THE FLOW INDICATOR SHOWED RED DURING TEST.    REPLACED SECOND OBSERVER`S OXYGEN MASK, OP CHECKED NORMAL IAW 35-12-000-4.

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