I seem to recall Tegel is not that long. Presumably he dumped because an overweight 747 and a short runway.......?
EDDT RWY 08L/26R 9920 ft/3023 m for landing.
Required RWY length at MLW for 747-400/ RWY dry/ ALT ~100ft
flaps 30: 6900 ft/2100 m
flaps 25: 7500 ft/2300 m
http://www.boeing.com/commercial/air...s/7474sec3.pdf