. >> ed wilson is in the cockpit, he's the new chief pilot, and he takes off. >> and let's just takese) >> a short time after this first maiden flight, ed wilson, he and his co-pilots start to realize that the 737 max is not handling as smoothly as it should in certain low-speed situations. it's shortly after takeoff. you know, it's still kind of climbing to ascent. it's not going full speed. >> narrator: boeing engineers had an idea for how to deal with this. >> they know about mcas and they know that mcas was actually used for a similar situation in these high-speed maneuvers, and so theoretically, mcas could also be used in these other situations to also smooth out the handling. crucially, it's already been created. it's already been approved. and it's something that we could just apply, you know, to a different phase of flight. it's actually a pretty easy fix. this ends up being an extremely fateful decision. they enable the stabilizer to move much more, actually four times as much. now the system is designed for low-speed situations like ju after takeoff. and after takeoff is wh