Release Levers
Inflate Harness when squeezed and deflate harness when released.

N / 100% Selector

• N - Regulates oxygen/cockpit air mixture in proportion to cabin altitude for demand breathing up to a predetermined altitude.
• 100% - Provides 100% flow on demand up to a predetermined altitude and 100% constant flow above that altitude.

Reset / Test Slide Lever
Mask stowed - Allows Oxygen to flow into the regulator momentarily for test when pushed down.

Container Doors
Hold stowed Mask in container.

Inflatable Harness
Inflates to allow donning Mask when release levers are squeezed and Mask is removed from container.

Flow Indicator
Indicates Oxygen Flow when yellow cross is visible.

Emergency / Press to Test

• Press to Test - Allows oxygen to flow through the Mask for Test when pushed with Maskstowed.
• Emergency - When rotated, provides 100% oxygen under positive pressure regardlessof cabin altitude.

Vent Valve Selector
Used only when smoke goggles are donned, opens Vent Valve when slid down, allowing oxygen to flow inside the smoke goggles to clear smoke or other eye irritants.

Release Levers
Release Mask from container when squeezed and pulled. Oxygen starts flowing when doors open and harness inflates.