<< >> NASA ASRS Report 292534, December 1994

First officer's oxygen system (crew) leaking. Flight crew turns off oxygen at the bottle and continues flight.

Attributes
ACN	292534
Time
Date	199412
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	292534
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	292535
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft had numerous write-ups of oxygen quantity loss. Mechanic replaced B fitting and all tests were normal. Prior to takeoff oxygen quantity checked normal. During climb out first officer's oxygen mask was expelling oxygen. Pressure was decreasing -- turned off oxygen valve on cylinder and loss was stopped. Gross weight was 141.4 with a full passenger load. Decision was made to continue rather than to air interrupt. Briefing was made that in the event of a pressurization problem to turn on oxygen valve and land at nearest suitable. Flight was completed uneventful.

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Original NASA ASRS Text

Title: FO'S OXYGEN SYS (CREW) LEAKING. FLC TURNS OFF OXYGEN AT THE BOTTLE AND CONTINUES FLT.

Narrative: ACFT HAD NUMEROUS WRITE-UPS OF OXYGEN QUANTITY LOSS. MECH REPLACED B FITTING AND ALL TESTS WERE NORMAL. PRIOR TO TKOF OXYGEN QUANTITY CHKED NORMAL. DURING CLBOUT FO'S OXYGEN MASK WAS EXPELLING OXYGEN. PRESSURE WAS DECREASING -- TURNED OFF OXYGEN VALVE ON CYLINDER AND LOSS WAS STOPPED. GROSS WT WAS 141.4 WITH A FULL PAX LOAD. DECISION WAS MADE TO CONTINUE RATHER THAN TO AIR INTERRUPT. BRIEFING WAS MADE THAT IN THE EVENT OF A PRESSURIZATION PROB TO TURN ON OXYGEN VALVE AND LAND AT NEAREST SUITABLE. FLT WAS COMPLETED UNEVENTFUL.

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.