Originally Posted by
FGD135
calypso,
I think yours is a very good summation. I was just looking closely at the JT610 FDR data last night. The big difference between the Lionair accident flight and the previous flight was that the previous crew immediately disabled the electric stab trim.
You should look again at that Lion Air FDR data. It clearly shows the pilots of the previous flight NOT immediately disabling electric trim, and instead fighting MCAS for at least 4 minutes before disabling it. On the time axis each grid unit has 11 minutes, and the fight with MCAS is represented over almost half a grid unit.