Boeing Believed a 737 Max Warning Light Was Standard. It Wasn’t

When Boeing explained to pilots in one meeting how systems on the Max worked, the company said that the disagree alert would function on the ground. Mr. Tajer said the company recently told American pilots that the system would not alert pilots about any sensor disagreement until the aircraft is 400 feet above the ground. A Boeing spokesman confirmed this, stressing that the disagree alert does not work on the ground, and thus could not have alerted the Lion Air pilots to a faulty sensor before takeoff.

Source: www.nytimes.com