Flight crew oxygen depleted by failure to secure system. Jump seat rider.

Attributes
ACN	315618
Time
Date	199509
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zkc
State Reference	MO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6000 flight time type : 3000
ASRS Report	315618
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

We had a pilot commuting home from work in the jump seat of the B727. I asked him if he was familiar with use of oxygen, audio panel, escape route, etc. In that he is a pilot on the same equipment, he was familiar. Just prior to pushback and as he was checking his oxygen mask and its emergency full flow function, the flight attendant came up and said that she had an empty seat in first class for the jump seat rider. Away he went. After completing the leg to den from atl, we were on the return leg den-atl, about half way into the flight, when the so remarked, 'oh, shoot.' the crew oxygen gauge indicated '0' pressure. We all checked our supply valves, and you guessed it, the (former) jump seat rider had left his in the emergency full flow position. We then descended, and also made our walk-around bottles available to our seat position, and continued our flight. The lesson here is that just because a non crew member in the jump seat is familiar with the equipment, don't assume he'll do it right! Also, the so needs to keep the oxygen pressure gauges in his scan.

Original NASA ASRS Text

Title: FLC OXYGEN DEPLETED BY FAILURE TO SECURE SYS. JUMP SEAT RIDER.

Narrative: WE HAD A PLT COMMUTING HOME FROM WORK IN THE JUMP SEAT OF THE B727. I ASKED HIM IF HE WAS FAMILIAR WITH USE OF OXYGEN, AUDIO PANEL, ESCAPE RTE, ETC. IN THAT HE IS A PLT ON THE SAME EQUIP, HE WAS FAMILIAR. JUST PRIOR TO PUSHBACK AND AS HE WAS CHKING HIS OXYGEN MASK AND ITS EMER FULL FLOW FUNCTION, THE FLT ATTENDANT CAME UP AND SAID THAT SHE HAD AN EMPTY SEAT IN FIRST CLASS FOR THE JUMP SEAT RIDER. AWAY HE WENT. AFTER COMPLETING THE LEG TO DEN FROM ATL, WE WERE ON THE RETURN LEG DEN-ATL, ABOUT HALF WAY INTO THE FLT, WHEN THE SO REMARKED, 'OH, SHOOT.' THE CREW OXYGEN GAUGE INDICATED '0' PRESSURE. WE ALL CHKED OUR SUPPLY VALVES, AND YOU GUESSED IT, THE (FORMER) JUMP SEAT RIDER HAD LEFT HIS IN THE EMER FULL FLOW POS. WE THEN DSNDED, AND ALSO MADE OUR WALK-AROUND BOTTLES AVAILABLE TO OUR SEAT POS, AND CONTINUED OUR FLT. THE LESSON HERE IS THAT JUST BECAUSE A NON CREW MEMBER IN THE JUMP SEAT IS FAMILIAR WITH THE EQUIP, DON'T ASSUME HE'LL DO IT RIGHT! ALSO, THE SO NEEDS TO KEEP THE OXYGEN PRESSURE GAUGES IN HIS SCAN.

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.