Befor you all jump on the bandwagon and attack me this is only a RUMOUR heard it down route!!AND NO, I am not starting a crusade or Jihad against EK.
Because of MFF(mixed fleet flying) there has been strong emphasis on rotation and tailstrike. The rumour is the PF was a TRE,using flex t/off rwy 21R.the rotation was slow, the a/c drags along the rwy, PF applies TOGA the a/c pitches up with instant forward stick input from PF sidestick to counteract the pitchup tendency. once airborne part of the damage from the landing gear strikes the wing trailingedge causing the flaps to cease. Capt decides to jettison to max landing wt, and returns to land. On landing most tyres bust and a/c comes to stop at end or rwy.