The Pilots Are Trying to Dump Fuel

The flight was still descending and was at an altitude of 21 thousand feet. The crew said they were going to need more than 30 nautical miles in order to continue their descent to land. At one 19, the controller instructed the crew to fly a zero three zero, heading for a landing on runway six. And about 20 seconds later, both pilots almost simultaneously declared an emergency,. They said they started to jump fuel and they needed to land immediately. But that was actually a mistake. That was the current weight of the plane and not the amount of fuel ther so theyre just distracted. So they're dumping fuel so that they landlike why exactly? There's a maximum weight that they should