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Aci discovered crew O2 pressure was zero during climbout from den. O2 bottle had been changed prior to departure.
| Attributes | |
| ACN | 109433 |
| Time | |
| Date | 198904 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | msl bound lower : 10000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv tracon : den |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8900 flight time type : 3500 |
| ASRS Report | 109433 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
At approximately 10000' MSL an FAA jump seat rider advised us that the crew O2 bottle was empty. The first officer confirmed this. (The crew O2 bottle was changed just prior to departure in den and was within limits during preflight.) I asked first officer to consult the aircraft flight manual. In the meantime we were cleared to FL230 (we stopped climb at FL200), looking for traffic, avoiding build-ups and trying to climb out of the turbulence. During this time the first officer and the FAA jump seat rider got involved in a discussion about the problem. As it was obvious that we needed crew O2, but unclear if we could continue even at 10000', I decided to return to den and have the aircraft O2 serviced. At den it was determined that there was an O2 leak somewhere in the O2 system and not the bottle; the aircraft was removed from service so that maintenance could locate and repair the problem.
Original NASA ASRS Text
Title: ACI DISCOVERED CREW O2 PRESSURE WAS ZERO DURING CLIMBOUT FROM DEN. O2 BOTTLE HAD BEEN CHANGED PRIOR TO DEP.
Narrative: AT APPROX 10000' MSL AN FAA JUMP SEAT RIDER ADVISED US THAT THE CREW O2 BOTTLE WAS EMPTY. THE F/O CONFIRMED THIS. (THE CREW O2 BOTTLE WAS CHANGED JUST PRIOR TO DEP IN DEN AND WAS WITHIN LIMITS DURING PREFLT.) I ASKED F/O TO CONSULT THE ACFT FLT MANUAL. IN THE MEANTIME WE WERE CLRED TO FL230 (WE STOPPED CLB AT FL200), LOOKING FOR TFC, AVOIDING BUILD-UPS AND TRYING TO CLB OUT OF THE TURB. DURING THIS TIME THE F/O AND THE FAA JUMP SEAT RIDER GOT INVOLVED IN A DISCUSSION ABOUT THE PROB. AS IT WAS OBVIOUS THAT WE NEEDED CREW O2, BUT UNCLEAR IF WE COULD CONTINUE EVEN AT 10000', I DECIDED TO RETURN TO DEN AND HAVE THE ACFT O2 SERVICED. AT DEN IT WAS DETERMINED THAT THERE WAS AN O2 LEAK SOMEWHERE IN THE O2 SYS AND NOT THE BOTTLE; THE ACFT WAS REMOVED FROM SVC SO THAT MAINT COULD LOCATE AND REPAIR THE PROB.
Data retrieved from NASA's ASRS site as of August 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.