Was er aufgrund der zur Verfügung stehenden Fotos beobachtete waren Perforationen des Cockpits:
The facts speak clear and loud and are beyond the realm of speculation: The cockpit shows traces of shelling! You can see the entry and exit holes. The edge of a portion of the holes is bent inwards. These are the smaller holes, round and clean, showing the entry points most likely that of a 30 millimeter caliber projectile.