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An large transport air carrier lost all of its cockpit emergency oxygen over the atlantic. They substituted walkaround bottles for aircraft oxygen.
| Attributes | |
| ACN | 223182 |
| Time | |
| Date | 199210 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : yay |
| State Reference | NF |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqx |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 7000 flight time type : 210 |
| ASRS Report | 223182 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 1300 |
| ASRS Report | 223176 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Prior to top of descent, it was discovered that the crew oxygen, emergency supply, was below pressure limits. The system has tested normal prior to departure and quantities were normal. The system has been used per regulations when one crew member leaves his station for physiological needs. 2 walk around oxygen bottles and the smoke/oxygen bottle were placed for standby use. No obvious reason was found for the loss of oxygen pressure. The location of oxygen mask units is in a poor position making a random visual inspection during the course of a flight difficult if no impossible. A logbook entry was made to correct the situation.
Original NASA ASRS Text
Title: AN LGT ACR LOST ALL OF ITS COCKPIT EMER OXYGEN OVER THE ATLANTIC. THEY SUBSTITUTED WALKAROUND BOTTLES FOR ACFT OXYGEN.
Narrative: PRIOR TO TOP OF DSCNT, IT WAS DISCOVERED THAT THE CREW OXYGEN, EMER SUPPLY, WAS BELOW PRESSURE LIMITS. THE SYS HAS TESTED NORMAL PRIOR TO DEP AND QUANTITIES WERE NORMAL. THE SYS HAS BEEN USED PER REGS WHEN ONE CREW MEMBER LEAVES HIS STATION FOR PHYSIOLOGICAL NEEDS. 2 WALK AROUND OXYGEN BOTTLES AND THE SMOKE/OXYGEN BOTTLE WERE PLACED FOR STANDBY USE. NO OBVIOUS REASON WAS FOUND FOR THE LOSS OF OXYGEN PRESSURE. THE LOCATION OF OXYGEN MASK UNITS IS IN A POOR POS MAKING A RANDOM VISUAL INSPECTION DURING THE COURSE OF A FLT DIFFICULT IF NO IMPOSSIBLE. A LOGBOOK ENTRY WAS MADE TO CORRECT THE SITUATION.
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.