737 Flight Crew Operations Manual
Airplane General, Emergency
Equipment, Doors, Windows -
Systems Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 1.40.23
CAUTION: Do not push the harness cross straps into or behind the nose
piece. Doing this may cause the cross straps to hang up on the
mask during inflation.
• Position the supply hose down the center of the facepiece.
• Insert the mask-regulator assembly into the stowage box, beginning
with the harness (regulator up).
• Press down on the assembly until the mask-regulator is fully seated
against the stop in the stowage box.
• Close the left-hand door. The “OXY ON” flag will slide into view at the
center of the door
• Close the right-hand door, ensuring not to pinch the hose
• Press, then release the “TEST AND RESET” control lever on the
left-hand door. Ensure that the “OXY ON” flag disappears when the
control lever is released.
WARNING: Do not squeeze the red inflation levers during stowing. Doing
this will inflate the harness and prevent the correct stowing of
the mask.
September 15, 2016
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