The Airbus A320neo and the Boeing 737MAX families have substantial backlogs, as they promise better fuel efficiency than earlier models. New engine technology with the CFM Leap and Pratt & Whitney GTF promises 15-16% better fuel efficiency than the older CFM-56 and V2500 engines they replaced. But do they live up to their promises?
The concept of a re-engined is attractive on many fronts. The airframe essentially remains the same and familiar to existing mechanics. Pilots can complete transition training within just a few hours rather than weeks, and the aircraft is compatible with existing gates and ground infrastructure. A simple one-for-one replacement is very attractive for an airline.
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