That armoured door is supposed to ensure this can never happen
until the armoured door is no longer attached to the rest of the aircraft behind it.
FWIW could the assumption be of at least some aviation knowledge by hi-jackers? Therefore an attempt to make it seem like Ops normal by continuing on the usual routing? In this case though it looks like coming in from the other end might have been better, but I have no idea what the surface wind was.