737 MAX Flight Crew Operations Manual
Airplane General, Emergency
Equipment, Doors, Windows -
Controls and Indicators
MN-FLT-OH-201
1.30.17
3
Regulator and Inflation Lever (Hidden)
1B401, 1B402, 1B801 - 1J594
Grasp Regulator and pull up –
• allows mask removal from stowage box
• activates oxygen and microphone when stowage box doors open
Squeeze Inflation Lever –
• inflates harness.
Oxygen Mask and Regulator
1
Regulator Selector
Rotate –
• EMER - supplies 100% oxygen under positive pressure at all cabin
altitudes. Use to purge contaminants from mask and to remove
condensation or fogging from interior of mask lens.
• 100% - supplies 100% oxygen on demand
• NORM - supplies air/oxygen mixture on demand (ratio depends on
cabin altitude)
CAUTION: Use of EMER mode depletes oxygen supply at higher rate than
100% or NORM mode. Use EMER mode only as conditions
require.
Note:
Communications in EMER mode may be difficult. Switch to 100% or
NORM if conditions allow.
CREWMEMBER STATION
HARNESS
MASK
MICROPHONE
REGULATOR
(shown inflated)
GOGGLES
1
2
March 1, 2021