In a quest to cut costs (and, it seems, to see how far idiocy can become a strategic objective) Boeing cut off the input from their own test pilots.
Boeing Co. BA 0.18% limited the role of its own pilots in the final stages of developing the 737 MAX flight-control system implicated in two fatal crashes, departing from a longstanding practice of seeking their detailed input, people familiar with the matter said.
As a result, Boeing test pilots and senior pilots involved in the MAX’s development didn’t receive detailed briefings about how fast or steeply the automated system known as MCAS could push down a plane’s nose, these people said. Nor were they informed that the system relied on a single sensor—rather than two—to verify the accuracy of incoming data about the angle of a plane’s nose, they added.
Investigators have linked faulty sensor data to the flight-control system’s misfire, which led to crashes in Indonesia and Ethiopia that took 346 lives.
https://www.wsj.com/articles/boeings-own-test-pilots-lacked-key-details-of-737-max-flight-control-system-11556877600?mod=searchresults&page=1&pos=4