Not all planes have the ability to dump fuel midair. A bit more info here [0] but it really just comes down to the model and exact options ordered at manufactur

Not all planes have the ability to dump fuel midair. A bit more info here [0] but it really just comes down to the model and exact options ordered at manufacturing time. My understanding is that fuel dump systems are rarely used and add a lot of maintenance overhead & complexity, extra regulatory things but most of all, unnecessary added weight. [0]: https://en.wikipedia.org/wiki/Fuel_dumping https://en.wikipedia.org/wiki/Fuel_dumping