United extends ban on Boeing 737 Max after regulator finds new problem
American and Southwest airlines have also cancelled flights until September as planemaker scrambles to find a fix
United Airlines has become the latest carrier to extend its ban on using the Boeing 737 Max after the US aviation regulator said it had identified a new potential risk with the plane.
As the Federal Aviation Administration said on Wednesday that Boeing must address the new issue before the jet can return to service, United joined American and Southwest in continuing to ground the plane through August.