flight plan ezfw was closed to max(60.5) tankering sector up to max landing weight. crew were given an actual zfw of 49.5? with a full cabin!!!!!!!!!! so they decided to fill it up cause they were no restricted to max landing weight 49.5+18.4=67.9.
takeoff speed and flex were taken based on takeoff weight of 67.7
having a full load a/c going to bom u expecting at least a 59 to 60.5 actual zfw and no less than that!!!!!!! crew were happy that a full a320 going to bom had a actual zfw of 49.5
noone questioned each other if that was normal???? they were happy with the numbers!!!!!!!!!!
actual zfw was 60 instead of 49.5(load sheet error,or dry operating tonnes error)and thats makes a actual takeoff weigth of 78.2(1.2 tonnes more than the max structural weight!!!!!!!!)
basically they took off with 78.2 using speeds and flex of 67.7
crew never questioned the actual zfw that was given to them against common sence, never questioned that they needed 40% n1 to keep it rolling for taxi, something which is abnormal(a320 needs no power to start moving specially on 68 tonnes)
they took off using flex, never spotted the slow acceleration never used toga for the takeoff, and what happenned next i leave it to u imagination!!!!!!
they continue to bom on their opt altitude arrived there and hold for another 1and a half to 2 hours to burn fuel to make a safe landing within the numbers(64.5 max landing weight)
they have not even think since they continued the flight to stay low level and burn that fuel instead of holding over bom for the same reason.
investigation is going on! and both of them are still on line!!!!!!!!?????????????