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Captain of an air carrier widebody transport failed to assure that the remaining pilot at the controls when the other left the cockpit was wearing an oxygen mask as required by the FARS.
| Attributes | |
| ACN | 450273 |
| Time | |
| Date | 199909 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : hnl.airport |
| State Reference | HI |
| Altitude | msl bound lower : 26000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute : pacific |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 10000 flight time type : 300 |
| ASRS Report | 450273 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : far non adherence other other anomaly other |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
During cruise flight above FL250, each of the crew members left the cockpit 2 times separately, for physiological needs. The captain felt it not necessary to don oxygen mask while 1 crew member was absent from cockpit. Unfortunately, a jump seater was present the entire time -- sometimes asleep, sometimes not. Also due to crew fatigue, we didn't think of the importance and the requirement of oxygen mask on above FL250. The jump seater asked about the requirement as a curious query. The oversight of the crew due to fatigue and sometimes past experience with other captain not to enforce the oxygen mask requirement (complacency) led to the oversight. Lesson learned: be more alert and vigilant!
Original NASA ASRS Text
Title: CAPT OF AN ACR WDB FAILED TO ASSURE THAT THE REMAINING PLT AT THE CTLS WHEN THE OTHER LEFT THE COCKPIT WAS WEARING AN OXYGEN MASK AS REQUIRED BY THE FARS.
Narrative: DURING CRUISE FLT ABOVE FL250, EACH OF THE CREW MEMBERS LEFT THE COCKPIT 2 TIMES SEPARATELY, FOR PHYSIOLOGICAL NEEDS. THE CAPT FELT IT NOT NECESSARY TO DON OXYGEN MASK WHILE 1 CREW MEMBER WAS ABSENT FROM COCKPIT. UNFORTUNATELY, A JUMP SEATER WAS PRESENT THE ENTIRE TIME -- SOMETIMES ASLEEP, SOMETIMES NOT. ALSO DUE TO CREW FATIGUE, WE DIDN'T THINK OF THE IMPORTANCE AND THE REQUIREMENT OF OXYGEN MASK ON ABOVE FL250. THE JUMP SEATER ASKED ABOUT THE REQUIREMENT AS A CURIOUS QUERY. THE OVERSIGHT OF THE CREW DUE TO FATIGUE AND SOMETIMES PAST EXPERIENCE WITH OTHER CAPT NOT TO ENFORCE THE OXYGEN MASK REQUIREMENT (COMPLACENCY) LED TO THE OVERSIGHT. LESSON LEARNED: BE MORE ALERT AND VIGILANT!
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.