Not really the point is it though? I have no desire to fly on a plane that has a fault obviously but EU law requires airlines to compensate passengers when delays occur other than those caused by exceptional circumstances. That's what the regs say so an airline which wants to fly in or out of...
Just in the middle of trying to get Monarch to pay up after a 25 hour delay coming back from Sharm. They try every trick in the book to avoid paying but worth checking if you have legal cover on your home insurance which should provide advice and cover for this sort of dispute.