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A B757-200 flight crew reports they did not properly accomplish the oxygen [mask] check by pressing the test switch for a full five seconds. Pilot was later informed the crew oxygen bottle valve handle was in the 'off' position after coming out of a maintenance 'C' check. The flight crew unknowingly departed without crew oxygen available.
| Attributes | |
| ACN | 882396 |
| Time | |
| Date | 201004 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Pilot Flying |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Total 9500 Flight Crew Type 3800 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance |
Narrative:
During cockpit preparation checks we did not accomplish the full oxygen check; pressing the test switch for a full five seconds. The oxygen check was normal otherwise. In the future I will do this check as indicated on the captains cockpit checklist in the normals section of the flight manual. We were later informed that the oxygen valve had been 'off' after coming out of a maintenance 'C' check and was actually 'off' for our flight.
Original NASA ASRS Text
Title: A B757-200 flight crew reports they did not properly accomplish the Oxygen [Mask] Check by pressing the Test switch for a full five seconds. Pilot was later informed the Crew Oxygen bottle valve handle was in the 'Off' position after coming out of a Maintenance 'C' Check. The flight crew unknowingly departed without crew oxygen available.
Narrative: During Cockpit Preparation Checks we did not accomplish the full Oxygen Check; pressing the test switch for a full five seconds. The Oxygen Check was normal otherwise. In the future I will do this Check as indicated on the Captains Cockpit Checklist in the Normals section of the Flight Manual. We were later informed that the Oxygen valve had been 'Off' after coming out of a Maintenance 'C' check and was actually 'Off' for our flight.
Data retrieved from NASA's ASRS site as of April 2012 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.