B757-200 crew member was out of his seat without the other crew member being on oxygen.

Attributes
ACN	541666
Time
Date	200203
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : czeg.artcc
State Reference	AB
Altitude	msl single value : 39000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : czeg.artcc tower : pdk.tower
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 100 flight time total : 14700 flight time type : 5500
ASRS Report	541666
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 11300 flight time type : 1500
ASRS Report	541546
Events
Anomaly	non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb other other : 3
Resolutory Action	none taken : anomaly accepted other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft FAA
Primary Problem	Flight Crew Human Performance

Narrative:

I was captain on an international flight from the lower united states to anchorage. While in cruise at FL390, the FAA international route inspector left the flight deck for physiological needs. I left my seat to secure the flight deck door during his absence and sat back down. When the inspector returned, the first officer left his seat to open the door and resecure the door. He also immediately sat down. During the 20-30 seconds each of us was absent from our respective duty stations, in order to ensure the security of the flight deck door, neither the first officer nor I donned our oxygen masks. This was an oversight on our parts, especially mine as captain. The regulation states 'should 1 crew member leave their duty station, the other will wear and use oxygen till the return of the absent crew member to their duty station.' although fatigue may have played a part in my oversight (I had flown a red eye from anchorage to the lower united states the previous night, and the occurrence was again late according to my body clock), I am still responsible to ensure far and flight operations discipline is maintained during all phases of all flts.

Original NASA ASRS Text

Title: B757-200 CREW MEMBER WAS OUT OF HIS SEAT WITHOUT THE OTHER CREW MEMBER BEING ON OXYGEN.

Narrative: I WAS CAPT ON AN INTL FLT FROM THE LOWER UNITED STATES TO ANCHORAGE. WHILE IN CRUISE AT FL390, THE FAA INTL RTE INSPECTOR LEFT THE FLT DECK FOR PHYSIOLOGICAL NEEDS. I LEFT MY SEAT TO SECURE THE FLT DECK DOOR DURING HIS ABSENCE AND SAT BACK DOWN. WHEN THE INSPECTOR RETURNED, THE FO LEFT HIS SEAT TO OPEN THE DOOR AND RESECURE THE DOOR. HE ALSO IMMEDIATELY SAT DOWN. DURING THE 20-30 SECONDS EACH OF US WAS ABSENT FROM OUR RESPECTIVE DUTY STATIONS, IN ORDER TO ENSURE THE SECURITY OF THE FLT DECK DOOR, NEITHER THE FO NOR I DONNED OUR OXYGEN MASKS. THIS WAS AN OVERSIGHT ON OUR PARTS, ESPECIALLY MINE AS CAPT. THE REG STATES 'SHOULD 1 CREW MEMBER LEAVE THEIR DUTY STATION, THE OTHER WILL WEAR AND USE OXYGEN TILL THE RETURN OF THE ABSENT CREW MEMBER TO THEIR DUTY STATION.' ALTHOUGH FATIGUE MAY HAVE PLAYED A PART IN MY OVERSIGHT (I HAD FLOWN A RED EYE FROM ANCHORAGE TO THE LOWER UNITED STATES THE PREVIOUS NIGHT, AND THE OCCURRENCE WAS AGAIN LATE ACCORDING TO MY BODY CLOCK), I AM STILL RESPONSIBLE TO ENSURE FAR AND FLT OPS DISCIPLINE IS MAINTAINED DURING ALL PHASES OF ALL FLTS.

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.