Prime Minister Theresa May has phoned US President Donald Trump over a threat to jobs at Bombardier in Belfast from a trade dispute.
In 2016, Canadian firm Bombardier won an order to supply up to 125 CSeries passenger jets to US airline Delta.
The wings for the CSeries are made at Bombardier’s Belfast plant.
However, rival aircraft firm Boeing has complained to the US authorities that the deal was unfairly subsidised by the Canadian state.
The US Department of Commerce is due to make a ruling later this month.
It could hit Bombardier with punitive tariffs.
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