Ethiopian airliner down in Africa

[PEI_3721]

Originally Posted by fgrieu

Do I get it correctly that "blowback" of the elevator would be a situation when the actuators for the elevator are not powerful enough to overcome the aerodynamic forces on the elevator, due to high speed (and perhaps an already high angle)?
Is there any indication that a 737 elevator (with nominally working actuators) can be in this situation in some flight regime?

See, related: Boeing advice on "aerodynamically relieving airloads" using manual stabilizer trim

and B737 RUNAWAY STABILIZER NNC