Sorry sport. I will believe my friend since he has domain expertise (as opposed to "Google experts"). Also, please stop yelling.
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Originally Posted by DeanFL
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THAT is NOT TRUE - as documented in many places. The MCAS system was designed initially to NOT be 'turned off' - SOLELY automatic to avoid a stall. The first crash-Lion Air- the pilots had NO idea about the MCAS system - in ALL Boeing pilot literature the ONLY mention of MCAS was in the footnote as an acronym.
Apparently Boeing made a SW update after the Lion Air crash but it STILL did not allow the pilots of the 2nd crash to disengage. This is all documented in Boeing internal docs and flight recorders. The evidence had showed that the pilots CONTINUALLY tried to turn off the circuit breaker/power to the rear stabilizer to attempt to PULL UP, but when re-engaing the MCAS CONTINUALLY pushed the nose down, the pilots simply could not maintain control over the MCAS.
NOW - Boeing has the ability to disengage MCAS, on the latest one FAA 'certified'.
It would be as if Tesla had a serious design issue with its autonomous feature in its cars - but allowed the driver to turn the system off if it malfuntioned in any way....hopefully before a crash.
As mentioned prior, all this MCAS-stuff was incorporated to overcome basic design functions in placing the new larger engines more ahead of the wings and higher, causing aero balance stability issues. period.
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