WASHINGTON—Lawmakers late on Tuesday declined to add an extension to an annual defense bill of a looming deadline that would impose a new safety standard for modern cockpit alerts for two new versions of Boeing’s best-selling 737 MAX aircraft.
The U.S. planemaker has been lobbying for months to convince lawmakers to waive the deadline that affects its MAX 7 and MAX 10 airplanes and was imposed by Congress in 2020 after two fatal 737 MAX crashes killed 346 people in Indonesia and Ethiopia.
