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737 MAX Flight Crew Operations Manual
Airplane General, Emergency
Equipment, Doors, Windows -
Systems Description
MN-FLT-OH-201
1.40.21
Water Fire Extinguishers
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
Chemical Fire Extinguishers
Chemical fire extinguishers (Halon or equivalent) 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.
Direction for use of the fire extinguisher is printed on the extinguisher.
DISCHARGE
NOZZLE
HANDLE
TRIGGER
SAFETY WIRED
March 1, 2021