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An A320 crew oxygen was svced by contract technicians. Oxygen bottle valve was closed to remove the service hose. Valve was not opened after hose removal.
| Attributes | |
| ACN | 638167 |
| Time | |
| Date | 200411 |
| Local Time Of Day | 1801 To 2400 |
| 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 | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 25 |
| ASRS Report | 638167 |
| 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 : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : crew oxygen press. indication |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : scheduled maintenance performance deficiency : testing performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
My co-worker and I were called out to service the crew oxygen on an air carrier Y A320. After servicing the aircraft bottle to full, we had to close the valve on the aircraft bottle in order to remove our service hose. After replacing the cap on the aircraft line, we forgot to turn the valve on the aircraft bottle back on. The following day, we were told by the maintenance lead on the next shift that the previous day, after the two of us had left, air carrier Y had called air carrier X maintenance due to no oxygen pressure on the same aircraft. The mechanic re-opened the valve to correct the problem.
Original NASA ASRS Text
Title: AN A320 CREW OXYGEN WAS SVCED BY CONTRACT TECHNICIANS. OXYGEN BOTTLE VALVE WAS CLOSED TO REMOVE THE SVC HOSE. VALVE WAS NOT OPENED AFTER HOSE REMOVAL.
Narrative: MY CO-WORKER AND I WERE CALLED OUT TO SVC THE CREW OXYGEN ON AN ACR Y A320. AFTER SVCING THE ACFT BOTTLE TO FULL, WE HAD TO CLOSE THE VALVE ON THE ACFT BOTTLE IN ORDER TO REMOVE OUR SVC HOSE. AFTER REPLACING THE CAP ON THE ACFT LINE, WE FORGOT TO TURN THE VALVE ON THE ACFT BOTTLE BACK ON. THE FOLLOWING DAY, WE WERE TOLD BY THE MAINT LEAD ON THE NEXT SHIFT THAT THE PREVIOUS DAY, AFTER THE TWO OF US HAD LEFT, ACR Y HAD CALLED ACR X MAINT DUE TO NO OXYGEN PRESSURE ON THE SAME ACFT. THE MECH RE-OPENED THE VALVE TO CORRECT THE PROB.
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.