Just for info after leaving RWY20 the 747 went over the ringweg (road around airport). This road is situated about 3 to 4 meters below the THR of RWY 02. So probably the structural damage happened when the aircraft drifted over the "ditch" of this road. nose went slightly down towards the road, NWG broke off, pushing the nose more down, enormous pressure on the top skin of the fuselage, causing it to break. Main landing gear collapses and the tail is still above the embankment, causing it to break. on jetphotos.net you can see the aircraft from the left hand side and you'll see the tail is still on the embankment.
Greetings
BM