# SDR 02FDEA00497

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2002
- Submitted: July 18, 2002
- Operation: Air carrier
- Aircraft: N465FE
- Make and model: Boeing 727-200
- Registry model: [Boeing 727-200](https://openairdocs.org/model/boeing-727-200) (OpenAirDocs)
- Aircraft serial: 21289
- Aircraft time: 47,771 hours, 33,615 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Bottle
- Condition: Faulty
- Location: Oxygen Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/02FDEA00497

## Discrepancy

THIRTY MINUTES INTO FLIGHT AT FL 350 OXYGEN QTY INDICATES ZERO.  ALL OXYGEN REGULATORS WERE IN EMERGENCY-OFF POSITION.  PERFORMED LEAK CHECK OF OXYGEN LINES IN E&E BAY, NO LEAKS.  CHECKED ALL MASKS AT REGULATORS IN COCKPIT, CHECK OK.  REPLACED BOTH OXYGEN BOTTLES, O2 PRESSURE 1900 PSI.  PERFORMED LEAK CHECK.  NO LOSS OF PRESSURE.  OK TO CONTINUE.

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