Originally Posted by
mcdhu
Officer Kite - the regulations tell us that when the Max Takeoff Weight (MTOW), less the fuel necessary for a 15 minute flight (including takeoff, approach and landing at the departure airport) is more than the maximum go-around weight, a fuel jettisoning system must be available.
So its nothing to do with the size of the aircraft, it's to do with the aircraft's go-around performance at MTOW with an engine out.
As far as I can remember from my theory, a fuel jettison system must be provided for all aircraft where the MTOM significantly exceeds the MLM. This pretty much covers all widebody/long haul aircraft. Just seemed very bizarre to see it.
I only passed my exam in this quite recently and EASA actually have a question specifically asking under what circumstances must a jettison system be provided ... what I've said above is the correct answer.
What if it was something more serious and they couldn't circle for 7 hrs ... would they have risked structural failure?