What Is Bleed Air?  Bleed air is compressed air that is taken
from an aircraft's engines and used to supply its climate
control system. For humans to survive a flight at high
altitudes, aircraft must pump pressurized air into the cabins.
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Free Widgets for your Site/Blog   Bleed air is compressed air
taken from aircraft turbine engines for cabin climate control
and systems such as de-icing equipment. Passengers traveling at
altitudes above approximately 12,000 feet (3,600 meters) may
need auxiliary breathing air to prevent hypoxia, or oxygen
starvation. Commercial aircraft use bleed systems to pressurize
the entire cabin rather than supplying individual passengers.
An aircraft cabin is a closed environment at high altitudes,
because the atmosphere outside contains too little oxygen to
sustain life. Pressure valves control the