art wrote:ArgentoSystems wrote:Boeing’s Own Test Pilots Lacked Key Details of 737 MAX Flight-Control System
https://www.wsj.com/articles/boeings-ow ... 1556877600
The start of the article says:Boeing Co. 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.
I thought it was the test pilots who recommended 2;5 degree pitch down per MCAS iteration ather than the original 0.6 degree (as reported). How could that be the case if they were not briefed on it? To me something does not stack up here.
This is old news guys, maybe re-hashed to suggest more than one or of two the test pilots were not told.
But also remember this was about the rate of change rather than the max deflection in a 9.26sec cycle. If my memory serves, the test pilots recommended that the rate of change needed to be greater and possibly over a more extensive part of the envelope after initial testing. The quote from at least one pilot was they were not then informed of, or tested, the change that had been made to address this recommendation.
It was suggested by other posters that the quoted test pilot may not have needed to know, but other test pilots may have been informed/tested the resultant implementation. As far as I know, none of the flight testing would have included fault condition testing.