AR used to operate 747s between AKL and EZE. SOP was to fuel them to capacity, pull the CBs for the fuel overfill shutoffs and then fill them until a little bit of fuel spilled out of the vents. They would then tow the aircraft to the end of the runway, start the engines and depart with unseemly haste. Apparently there was still a window of a couple of hours in the middle of the flight when they REALLY couldn't afford to lose an engine.....
P.S. Man-made climate change is a scam! Don't believe the lies! Make the world a better place: kick an environmentalist.