Boeing says all its planes, including the Max, give pilots all the flight information — including speed, altitude and engine performance — that they need to fly safely. The pilots' union at American Airlines expressed unhappiness about the matter, however, and said Boeing's assurance about the cockpit alert was a factor in the union standing behind Boeing after the first Max crash, in October. Jason Goldberg, an American Airlines pilot and union spokesman, said Boeing told pilots that the alert could pinpoint a faulty sensor even on the ground, before takeoff.