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B737NG captain reported pre-flight inspection revealed the crew oxygen system bottle valve was not properly opened.
| Attributes | |
| ACN | 1644416 |
| Time | |
| Date | 201905 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | LGA.Airport |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Flight Phase | Other Preflight planning |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 187 Flight Crew Type 11478 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
During the flight deck preparation the aircraft crew oxygen test [revealed] that the 1250 psi display would drop to 200 psi when tested. The maintenance remedy was to open the oxygen valve correctly. When the demand of a simple push to test occurred the value was not capable of supplying oxygen. A call to [maintenance] could not determine when the last time the oxygen was serviced or for how long [this was a] problem.
Original NASA ASRS Text
Title: B737NG Captain reported pre-flight inspection revealed the crew oxygen system bottle valve was not properly opened.
Narrative: During the flight deck preparation the aircraft crew oxygen test [revealed] that the 1250 psi display would drop to 200 psi when tested. The maintenance remedy was to open the oxygen valve correctly. When the demand of a simple push to test occurred the value was not capable of supplying oxygen. A call to [Maintenance] could not determine when the last time the oxygen was serviced or for how long [this was a] problem.
Data retrieved from NASA's ASRS site 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.