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And while this may not be warm enough to melt a heavy snow event before plows are needed, it can help deice the road surface and increase transportation safety, even in heavy snow events.

The FAA had determined last summer that a design flaw in the MAX’s engine inlet deicing system could be potentially catastrophic.

Southwest officials say they have since purchased additional deicing trucks and heating equipment and will add staff at cold-weather airports depending on the forecast.

Road salts have an outsized impact in the U.S., which churns out 44 billion pounds of the deicing agent each year.

It takes anywhere from a few minutes to 40 minutes or longer to deice a plane, depending on the conditions and the size of the plane.