Embraer EMB145 Operation Manual page 2162

OXYGEN
CREW MASK STOWAGE BOXES
The crew mask stowage boxes are directly connected to the oxygen
distribution line and to the communication system. The pilot and copilot
boxes incorporate a shutoff valve, which keeps the mask regulator
unpressurized while in the stowed position.
When the box doors are opened, the shutoff valve is brought to open
position, thus allowing the oxygen flow to the mask.
After the mask has been taken out of the stowage box, the doors can
be closed without interrupting oxygen supply to the mask. To stop the
oxygen flow, it is necessary to close the left door and activate the
Test/Shutoff Sliding Control.
Pilot and copilot mask stowage boxes are also provided with a flow
indicator.
NOTE: The observer's mask stowage box is not provided with Test/
Shutoff Sliding Control (EROS Mask) or Test/Reset Button
(PURITAN Mask) and, although the masks are permanently
pressurized, oxygen will flow only on demand.
Page
2-16-10
AIRPLANE
OPERATIONS
MANUAL
Code
6 01
OCTOBER 02, 2001