Also no sign of any gust on the heading curve which
is straight as an arrow in the same period (8,5 deg/s)
Question: Couldn't a gust hit in an angle from the side, that would not influence the yaw/heading directly?
What about vertical wind components such as an local upwind or small air eddy that could lift one wing?
Does the A320 FDR also record the indicated wind component such as displayed on the PFD? Would the sampling interval be small enough to allow for the reliable measurement of short strong gusts?