With our fleets, particularly with the Boeing 737, there's only one engine variable. That's the LEAP-1B engine. It basically is a 40% reduction in the noise footprint compared to the aircraft that we purchased only 10 years earlier. Although not PurePower and not a product that way, it is one of the quietest engines. It's the only engine you can get on the 737 MAX, but it's a very quiet engine.
On December 11th, 2018. See this statement in context.