PSU
OXYGEN MASK DOOR (SHOWN OPEN)
RESERVOIR BAG MASK
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Airplane General, Emergency Equipment, Doors, Windows -

Systems Description
737 Flight Crew Operations Manual
WARNING: When using passenger oxygen, the “NO SMOKING” sign should be strictly observed. Once the generator is activated, the flow of oxygen is constant, whether or not the mask is being worn.
WARNING: Do not use passenger oxygen with cabin altitude below 14,000 feet when smoke or an abnormal heat source is present. The use of passenger oxygen does not prevent the passengers from inhaling smoke. Air inhaled is a mixture of oxygen and cabin air.
Passenger Portable Oxygen
YA613 - YA687, YA801 - YC413 First aid and supplemental portable oxygen cylinders are installed at suitable locations in the passenger cabin. The cylinders are fitted with a pressure gage, pressure regulator and on–off valve. The cylinders are pressurized to 1800 psi. At this pressure and a temperature of 70 degrees Fahrenheit, (21 degrees Celsius) the cylinders have a capacity of 4.25 cubic feet (120 liters) of free oxygen. Two continuous flow outlets are provided on each cylinder, one regulates flow at two liters per minute for walk–around; the second outlet provides flow at four liters per minute. The four–liter flow is used for first aid.
YC153 -YK104 First aid and supplemental portable oxygen cylinders are installed at suitable locations in the passenger cabin. The cylinders are fitted with a pressure gage, pressure regulator and on–off valve. The cylinders are pressurized to 1800 psi. At this pressure and a temperature of 70 degrees Fahrenheit, (21 degrees Celsius) the cylinders have a capacity of 11 cubic feet (311 liters) of free oxygen. Two continuous flow outlets are provided on each cylinder, one regulates flow at two liters per minute for walk–around; the second outlet provides flow at four liters per minute. The four–liter flow is used for first aid.
Duration can be determined by dividing capacity by outflow (120 liters divided by 4 liters/minute = 30 minutes).
Copyright . The Boeing Company. See title page for details.
1.40.22  September 29, 2005
Airplane General, Emergency Equipment, Doors, Windows -Systems Description
737 Flight Crew Operations Manual
Passenger Portable Oxygen Schematic
CONSTANT FLOW OUTLET (4 LITER FLOW)
CONSTANT FLOW OUTLET (2 LITER FLOW)
PRESSURE REGULATOR
ON-OFF VALVE
PRESSURE GAUGE

PLACARD
OXYGEN CYLINDER

Copyright . The Boeing Company. See title page for details.
September 29, 2005  1.40.23
Airplane General, Emergency Equipment, Doors, Windows -Systems Description 737 Flight Crew Operations Manual

Fire Extinguishers
Fire extinguishers are located in the flight deck and passenger cabin.
Water Fire Extinguishers YA613, YA626, YA721 - YK104
Water fire extinguishers contain a solution of water mixed with antifreeze. The container is pressurized by a CO2 cartridge when the extinguisher handle is rotated fully clockwise. The extinguisher should be used on fabric, paper or wood fires only.
To use the water fire extinguisher:
.
remove from stowage

.
rotate handle fully clockwise

.
aim at base of fire and press trigger.

CAUTION: Do not use on electrical or grease type fires.
Water Fire Extinguisher

Halon (BCF) Fire Extinguishers
Halon (BCF) fire extinguishers contain a liquefied gas agent under pressure. The pressure indicator shows an acceptable pressure range, a recharge range, and an overcharged range. A safety pin with a pull ring prevents accidental trigger movement. When released the liquefied gas agent vaporizes and extinguishes the fire. The extinguisher is effective on all types of fires, but primarily on electrical, fuel and grease fires.
Copyright . The Boeing Company. See title page for details.
1.40.24  September 27, 2004

Airplane General, Emergency Equipment, Doors, Windows -Systems Description
737 Flight Crew Operations Manual
To use the Halon fire extinguisher:
.
remove from stowage

.
hold upright and remove ringed safety pin

.
aim at base of fire from a distance of six feet and press top lever

.
use side to side motion to suppress fire.

BCF Fire Extinguisher (Halon 1211)

RING SAFETY PIN
PRESSURE GAUGE
HANDLE
Copyright . The Boeing Company. See title page for details.
Airplane General, Emergency Equipment, Doors, Windows -Systems Description 737 Flight Crew Operations Manual
　
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