There is a lot of uncertainty and concern now that the U.S. commerce department has slapped a 220% duty on Bombardier's C-Series planes.
Dave Chartrand, head of the Machinists Union said the ruling means possible bad news for workers.
"It could mean job losses in the long run, maybe not tomorrow morning, but it closes the American market which is the biggest, largest market for that type of aircraft right now," said Chartrand.
Veronique Proulx, Vice president, Quebec for the Quebec Manufacturers and Exporters said the ruling leaves her members in limbo.
"If the C-Series isn't being sold in the US, then they will have to go to other markets, but it will certainly take more time to be able to get to those markets," Proulx told CJAD 800 News.
"It brings a lot of uncertainty to the market and will certainly have a negative impact on the economy."
The International Trade Commission will make a final ruling early next year about whether any U.S. manufacturer will be harmed by imports of Bombardier's C-Series planes.
But the cloud of uncertainty can hurt the company in the meantime, said Karl Moore, associate professor at the Desautels Faculty of Management at McGill University.
"It's called fear, uncertainty and doubt. That we would go around, and Boeing and Boeing will do this, go around and say, 'Look, here's a Wall Street Journal article, I don't know if the C-Series is viable,' and they just plant that doubt," said Moore.
"It just makes people have uncertainty and doubt about the C-Series."