A B737-800 first officer turned the engine bleeds off after arrival the night before and forgot to o...

Attributes
ACN	917804
Time
Date	201011
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pneumatic Valve/Bleed Valve
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

Passing 10;000 ft MSL during climbout we got an intermittant altitude warning horn. I leveled off; we put on our oxygen masks; and noticed both bleed air switches were turned off. We selected manual pressurization; turned on the bleed switches and closed the outflow valve to get the pressurization under control. When the cabin pressurization returned to normal; auto was selected on the pressurization and the climb was continued without incident. The first officer stated during the post flight the night prior he turned off both bleed switches. Neither of us caught it during preflight or other checklists.

Original NASA ASRS Text

Title: A B737-800 First Officer turned the engine bleeds off after arrival the night before and forgot to open them the next morning during preflight. After climbing through 10;000 FT the CABIN ALTITUDE WARNING sounded; the bleeds were opened and pressurization restored.

Narrative: Passing 10;000 FT MSL during climbout we got an intermittant altitude warning horn. I leveled off; we put on our oxygen masks; and noticed both bleed air switches were turned off. We selected manual pressurization; turned on the bleed switches and closed the outflow valve to get the pressurization under control. When the cabin pressurization returned to normal; auto was selected on the pressurization and the climb was continued without incident. The First Officer stated during the post flight the night prior he turned off both bleed switches. Neither of us caught it during preflight or other checklists.

Data retrieved from NASA's ASRS site as of April 2012 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.

A B737-800 first officer turned the engine bleeds off after arrival the night before and forgot to open them the next morning during preflight. After climbing through 10;000 ft the cabin altitude warning sounded; the bleeds were opened and pressurization restored.