Boeing 737 MAX9 Latest United has high hopes for Boeing737 MAX 9 fuel efficiency News United has high hopes for Boeing737 MAX 9 fuel efficiency Boeing April 23, 2018 Subscribe Please enable JavaScript in your browser to complete this form.Please enable JavaScript in your browser to complete this form.First name *Last name *Email address *Interests *InterestsAir TransportAviation ServicesBusiness and General AviationDefenceEvent WrapsFuture WorkforceIn the SpotlightInnovation and TechnologyLeadershipManufacturingRegulationRotorcraftSpaceSustainabilityUnmannedUrban Air Mobility *I agree to Aerospace Global News' Privacy PolicySubscribe