Re:Ethiopian Airlines Boeing 737 pilots 'could not stop nose...
by treis on Thursday April 04, 2019 @11:46AM
(#19573667)
>The explanation put forward (which seems reasonable) is that the cutouts were disengaged because the aerodynamic forces were stronger than could be overcome by the manual control, so they had to turn the electrics back on in an attempt to move it (which allowed the MCAS to continue pushing the stabilizer to the extreme)
But the only way it would end at the total extreme is if they were within 2.5 degrees of max when they re-enabled electric trim and they crashed within 5 seconds. Otherwise, they should have been able to at least get some adjustment.
>Boeing’s anti-stall software on a doomed Ethiopian Airlines jet re-engaged up to four times after the crew initially turned it off due to suspect data from an airflow sensor, two people familiar with the matter have said.
But the only way it would end at the total extreme is if they were within 2.5 degrees of max when they re-enabled electric trim and they crashed within 5 seconds. Otherwise, they should have been able to at least get some adjustment.
>Boeing’s anti-stall software on a doomed Ethiopian Airlines jet re-engaged up to four times after the crew initially turned it off due to suspect data from an airflow sensor, two people familiar with the matter have said.
https://www.theguardian.com/business/2019/apr/03/ethiopian-a...
4 cycles should have gotten them to 7-10 degrees away from the extreme. So something else was going on.