Turkey’s AtlasJet is buying Bombardier CSeries narrowbodies, providing a much needed boost to the Canadian manufacturer’s flagship commercial airliner program.

The deal, not yet firm, is for 10 CS300s and five options, and valued at up to $1.18 billion.

It is the first pure low-fare airline order for the CSeries, says Bombardier Aerospace president Guy Hachey, who notes customers have spoken for 262 CSeries aircraft (133 aircraft are firm orders).

AtlasJet will receive its first aircraft in the first quarter 2016, with mid-2017 the final delivery. The configuration is not set, yet, but it will be single class.

Bombardier hopes the deal will become firm still this year.

Other deals are in the works. Hachey says “we are still talking to Qatar.”

Overall, Hachet says the development program has used its buffer, but the in-service dates have not changed.