[Klemm]

He means that there is an armored seat behind the pilot, but it doesn't seem to stop any bullets. This has been proven with the setting arcade=1.
It seems like the armourplate isn't moddeled in the hit-model of the airplane.
And the pilot seems very prone to be killed too. Hits far away from the pilot still result in his death some times. And not from splinters flying around or so.
So there is an armor plate, but it doesn't protect anything, which is a serious flaw in this plane.