LONDON — Monarch Airlines announced it intends to order thirty Boeing 737 MAX jets on Monday at the Farnborough Airshow in a deal worth over $3 billion. The company said via release that it was working to finalize terms and set a purchase agreement for the jets.

It will be limited to only MAX 8 airplanes, expected to deliver The order has been expected for several weeks, after the carrier confirmed it was in talks in early July.

The order, once finalized, is big win for the American manufacturer, which managed to flip the UK carrier from its current all-Airbus narrow-body fleet.

It comes as a moderate blow to Airbus, which makes up the majority of the carrier’s fleet, including all of its narrow-body, single aisle airplanes. Monarch had been debating between the MAX and Airbus’ A320neo family. So far in the narrow-body market carriers had instead been bailing on Boeing, choosing Airbus products instead.