Originally Posted by
EI-mech
If it's true that the MCAS only becomes active after flap retraction then I doubt it was involved in this instance. Acceleration (and thus flap retraction) doesn't happen until at least 1500' AGL, and it looks like this flight never even attained that height.
That is only based on the ADS B data online which may be inaccurate so only time will tell.
On a clear blue day like yesterday here in Addis, acceleration and flap retraction is routinely performed reaching 1000 AGL