Thu, Jan 06, 2011
Transport Canada Greenlights G450 And G350 To Fly Up To 45,000
Feet
Transport Canada has recently granted approval to allow
Gulfstream G450 and G350 aircraft to operate at their maximum
cruise altitude of 45,000 feet. Transport Canada normally restricts
flight to 41,000 feet or below, unless special conditions have been
met to ensure against rapid depressurization of the aircraft
cabin.
Gulfstream's Automatic Emergency Descent Mode (AEDM) was key to
obtaining this higher operational altitude. AEDM mitigates the risk
of occupant injury due to rapid depressurization by automatically
lowering the aircraft to the appropriate altitude. Should the
pilots become incapacitated due to depressurization, the AEDM
automatically turns the aircraft 90 degrees and lowers it to 15,000
feet (4,572 m) altitude and 250 knots air speed. This maneuver
allows the flight crew to regain consciousness and assume control
of the aircraft.
The G450 and G350 join the GV, G550 and G500 in being authorized
by Transport Canada to fly at their maximum certified altitudes.
The G550 and G500 were already approved to operate at 51,000 feet,
because they are equipped with both AEDM and a secondary pressure
bulkhead that can maintain cabin pressurization in the unlikely
event of an uncontained engine failure. These attributes enable the
aircraft to meet Transport Canada's high altitude special
conditions.
Flying at higher altitudes allows aircraft to avoid traffic
congestion and adverse weather. It also provides for more
fuel-efficient operation.
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