Check the
FAQ
Page 43 – Special Rules, Vector Strike.
Change the second paragraph to read “When Swooping, this
model may savage its prey. At the end of the Movement Phase,
nominate one unengaged enemy unit the model has moved
over that turn. This unit may even be an enemy Flyer. That unit
takes D3+1 hits, resolved at the model’s unmodified Strength
and AP3, using Random Allocation. Against vehicles, these hits
are resolved against the target’s side armour. No cover saves are
allowed against these hits.”