When fuel is dumped, it's at high altitude where it just evaporates.
Short haul jets can't do it, but their max takeoff weight is around their max landing weight, so it's fine. For long haul, it's not the same.
This is true but irrelevant to this crash. Most commercial jets are smaller (A320, 737 etc) and can't dump fuel.
Long-haul jets like the 787 do have the capability.
https://www.boeing.com/content/dam/boeing/boeingdotcom/comme...
When fuel is dumped, it's at high altitude where it just evaporates.
Short haul jets can't do it, but their max takeoff weight is around their max landing weight, so it's fine. For long haul, it's not the same.