Quote:
Originally Posted by SaskScraper
As more extremes of heat are more likely in the coming decades, especially in the West (hottest Canadian weather temperature has hit 45°C in Saskatchewan in the past), there may be more Bombardier flight cancellations in the future in the western part of continent.
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Doubt it, at least not for the heat ! CRJ's can handle 46/47C out of YXE/YQR.
This is an isolated event. It hasn't been this hot in PHX in over 20 years. Saskatchewan is not Phoenix.
But back on point, the main problem here is performance data on departure. If the pilots don't have the data to calculate takeoff speeds and weight above a certain temperature, then the flight cannot depart. So if the OAT (outside air temp) exceeds the top limit of the temp charts, then you're literally in uncharted territory. You are not allowed to extrapolate.
Bombardier CRJs are certified until ISA+35C (50C / 122 F at sea level, but just under 48C /118 F at PHX, due to it being at 1100 ft MSL). It was 48C for 3 hours yesterday in PHX.
Bombardier didn't spend the extra dollars to certify the plane for hotter temps because these are extremely rare circumstances, the limits of which would not significantly impact airplane sales to the customer.
And for anyone wondering, minimum operating temp for the CRJ is -40 C. This can be more of an issue in Canada than the heat.