How can a 777ER fly from the 9000 ft runway at Bologna (LIPE)?
LIPE - OMDB is only around 4,500 KM (2,800 NM) according to Great Circle Mapper, which is nowhere close to the 773ER max range of 14,500 KM (7,830 NM), so one can make an educated guess that the aircraft wasn't at MTOW.