<< >> NASA ASRS Report 1134116, December 2013

A B737-800 captain and first officer discovered their oxygen mask pressures at 0 psi during the preflight mask test and maintenance discovered the oxygen bottle valve not fully open after the bottle had been replaced the previous night.

Attributes
ACN	1134116
Time
Date	201312
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Oxygen System/Crew
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

During our preflight check we discovered that when the captain or first officer mask was tested the crew oxygen pressure went to zero. The crew oxygen bottle had been replaced the night before. Maintenance was called and the crew oxygen valve was discovered to be not fully open. Maintenance opened the valve fully; safety wired it; and signed it off in the logbook.

Related reports:

• An A320 pilot found a nose gear tire pressure below what he ...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: A B737-800 Captain and First Officer discovered their oxygen mask pressures at 0 PSI during the preflight mask test and maintenance discovered the oxygen bottle valve not fully open after the bottle had been replaced the previous night.

Narrative: During our preflight check we discovered that when the Captain or First Officer mask was tested the crew oxygen pressure went to zero. The crew oxygen bottle had been replaced the night before. Maintenance was called and the crew oxygen valve was discovered to be not fully open. Maintenance opened the valve fully; safety wired it; and signed it off in the logbook.

Data retrieved from NASA's ASRS site as of July 2013 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.