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A B737-200 crew reported crew oxygen had a low flow rate. Maintenance found crew oxygen bottle valve not fully opened after replacement.
| Attributes | |
| ACN | 582236 |
| Time | |
| Date | 200305 |
| Day | Wed |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 9 |
| ASRS Report | 582236 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing performance deficiency : installation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
At ZZZ aircraft preflight and flown to ZZZ. During preflight of 2ND leg, crew reported low oxygen flow. Maintenance crew reported oxygen bottle not fully opened. To best of my knowledge, oxygen bottle was fully opened after I svced oxygen bottle. If in fact, the valve was not fully opened, I can only attribute the awkward valve position as a contributing factor. In future when servicing crew oxygen, I will insure another mechanic inspects valve position after servicing.
Original NASA ASRS Text
Title: A B737-200 CREW RPTED CREW OXYGEN HAD A LOW FLOW RATE. MAINT FOUND CREW OXYGEN BOTTLE VALVE NOT FULLY OPENED AFTER REPLACEMENT.
Narrative: AT ZZZ ACFT PREFLT AND FLOWN TO ZZZ. DURING PREFLT OF 2ND LEG, CREW RPTED LOW OXYGEN FLOW. MAINT CREW RPTED OXYGEN BOTTLE NOT FULLY OPENED. TO BEST OF MY KNOWLEDGE, OXYGEN BOTTLE WAS FULLY OPENED AFTER I SVCED OXYGEN BOTTLE. IF IN FACT, THE VALVE WAS NOT FULLY OPENED, I CAN ONLY ATTRIBUTE THE AWKWARD VALVE POS AS A CONTRIBUTING FACTOR. IN FUTURE WHEN SVCING CREW OXYGEN, I WILL INSURE ANOTHER MECHANIC INSPECTS VALVE POS AFTER SVCING.
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.