Last year, the US Department of Commerce imposed the tariff on the back of a dispute which involved Boeing complaining that Bombardier had received unfair state subsidies from both the UK and Canada, helping it secure a major order.

It was placed on the import of Bombardier’s C-Series jet, the wings of which are made in Belfast. The company employs a workforce of 1,000 at the plant.

However, the US International Trade Commission has dismissed the case.

“Today’s decision (30 Jan) is a victory for innovation, competition and the rule of law,” said Bombardier in a statement. “It is also a victory for US airlines and the US traveling public.

“The C-Series is the most innovative and efficient new aircraft in a generation. Its development and production represent thousands of jobs in the United States, Canada and the United Kingdom. We are extremely proud of our employees, investors and suppliers who have worked together to bring this remarkable aircraft to the market.

“With this matter behind us, we are moving full speed ahead with finalizing our partnership with Airbus. Integration planning is going well and we look forward to delivering the C-Series to the US market so that US airlines and the US flying public can enjoy the many benefits of this remarkable aircraft.”

Angela McGowan, CBI NI director, added: “Bombardier is a hugely important company here in Northern Ireland and one that’s made an immense contribution to the local economy.

“It’s one of the biggest private sector employers in the region, with a supply chain that stretches across Northern Ireland. For those employed either directly or indirectly, this decision will be greeted with a sigh of relief.”

Karen Bradley, secretary of state for Northern Ireland, believes the company will now “continue to play a hugely important role in our economy as we build a Northern Ireland fit for the future”.