Narrative:

We reported at ewr to fly a flight to las. All checks and checklists were completed, including oxygen. Takeoff and climb were normal. En route, I did a fuel burn and system check and discovered the crew oxygen pressure read zero on ECAM (up to this point neither I nor my first officer had used the oxygen masks during the flight). I brought this to the attention of my first officer. We looked over our oxygen masks to see if anything appeared amiss. It did not. Kansas city was nearby in front of us, so I called soc and we agreed to go there. The cabin crew and passenger were informed. We also informed moc and mci operations. A slightly overweight landing was smoothly handled by my first officer at mci (which was also reported to maintenance and an information only write-up accomplished). The low oxygen pressure write-up was entered in the logbook. Maintenance did not have a replacement crew oxygen tank, so we were told to overnight at mci. Next day, we ferried the same (oxygen tank replaced) aircraft back to phoenix. The ferry flight was accomplished normally.

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Original NASA ASRS Text

Title: AN A320 FLT CREW DISCOVERS THAT THEIR OXYGEN SUPPLY HAS GONE TO '0' INFLT AND THEY DECIDE, ALONG WITH DISPATCH AND MAINT, TO DIVERT TO THE CLOSEST SUITABLE ARPT, MCI, MO.

Narrative: WE RPTED AT EWR TO FLY A FLT TO LAS. ALL CHKS AND CHKLISTS WERE COMPLETED, INCLUDING OXYGEN. TKOF AND CLB WERE NORMAL. ENRTE, I DID A FUEL BURN AND SYS CHK AND DISCOVERED THE CREW OXYGEN PRESSURE READ ZERO ON ECAM (UP TO THIS POINT NEITHER I NOR MY FO HAD USED THE OXYGEN MASKS DURING THE FLT). I BROUGHT THIS TO THE ATTN OF MY FO. WE LOOKED OVER OUR OXYGEN MASKS TO SEE IF ANYTHING APPEARED AMISS. IT DID NOT. KANSAS CITY WAS NEARBY IN FRONT OF US, SO I CALLED SOC AND WE AGREED TO GO THERE. THE CABIN CREW AND PAX WERE INFORMED. WE ALSO INFORMED MOC AND MCI OPS. A SLIGHTLY OVERWT LNDG WAS SMOOTHLY HANDLED BY MY FO AT MCI (WHICH WAS ALSO RPTED TO MAINT AND AN INFO ONLY WRITE-UP ACCOMPLISHED). THE LOW OXYGEN PRESSURE WRITE-UP WAS ENTERED IN THE LOGBOOK. MAINT DID NOT HAVE A REPLACEMENT CREW OXYGEN TANK, SO WE WERE TOLD TO OVERNIGHT AT MCI. NEXT DAY, WE FERRIED THE SAME (OXYGEN TANK REPLACED) ACFT BACK TO PHOENIX. THE FERRY FLT WAS ACCOMPLISHED NORMALLY.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.