An order for 40 aircraft parts made in Belfast "remains intact" despite the buyer announcing a change in its airline strategy.
A spokesperson for Bombardier in the city, where the wings of the new CSeries aircraft are being built, spoke after US-based Republic Airways said that the aircraft are no longer a top priority as it shelves plans to compete with major names by flying full-size jetliners.
The company ordered the C300 models in a £1.77bn deal in 2010.
While Republic told investors it hasn't decided to cancel the order, it has deferred making a decision as it focuses on profitability since selling low-cost carrier Frontier Airlines last December.
Republic boss Bryan Bedford said that there was "no place to operate the CSeries" in its revised business model.