However, Richard Aboulafia of the Teal Group, an aviation consultancy, thinks there is more technological risk with the Leap-X than with the GTF and greater uncertainty about whether it will deliver the same cost savings.
The GTF will power Mitsubishi's new regional jet, as well as Bombardier's new CSeries, a 110-130 seat (and potentially 150 seat) medium-range aircraft that has 90 firm orders, the latest coming from Republic Airways last month.