  We analyse the proof of the main result of a paper by Cuadra, Etingof and
Walton, which says that any action of a semisimple Hopf algebra $H$ on the
$n$th Weyl algebra $A=A_n(K)$ over a field $K$ of characteristic $0$ factors
through a group algebra. We verify that their methods can be used to show that
any action of a semisimple Hopf algebra $H$ on an iterated Ore extension of
derivation type $A=K[x_1;d_1][x_2;d_2][\cdots][x_n;d_n]$ in characteristic zero
factors through a group algebra.
