 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Captain reports that during their preflight check on a B737-800 aircraft; the crew oxygen (O2) bottle pressure dropped to zero; then rebounded to 1200 psi after crew O2 mask check test button was released. Maintenance found O2 bottle 'open/close' handle safety-wired in the partially opened position.
| Attributes | |
| ACN | 1159151 |
| Time | |
| Date | 201403 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
During preflight of oxygen mask/system; [crew] oxygen (O2) pressure dropped to zero then rebounded to 1200 psi after test button released. Notified maintenance who found O2 bottle improperly connected and safety wired in partially 'opened' position. Maintenance opened O2 bottle completely and re-safety wired it. I notified dispatch via ACARS and asked him to query maintenance control about maintenance history on the O2 system; but there was no recent activity. Flight departed 18-minutes late. [Bottle handle] false indication.
Original NASA ASRS Text
Title: Captain reports that during their preflight check on a B737-800 aircraft; the crew oxygen (O2) bottle pressure dropped to zero; then rebounded to 1200 PSI after crew O2 mask check Test button was released. Maintenance found O2 bottle 'Open/Close' handle safety-wired in the partially opened position.
Narrative: During preflight of Oxygen Mask/System; [crew] oxygen (O2) pressure dropped to zero then rebounded to 1200 PSI after TEST button released. Notified Maintenance who found O2 bottle improperly connected and SAFETY WIRED in partially 'Opened' position. Maintenance opened O2 bottle completely and re-safety wired it. I notified Dispatch via ACARS and asked him to query Maintenance Control about maintenance history on the O2 system; but there was no recent activity. Flight departed 18-minutes late. [Bottle handle] false indication.
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.