I just imagine the pilot and the fueler fighting over the fuel port door. Fueler opens it and walks back to the truck, the pilot closes the door and walks away, the fueler looks back and sees it closed, and walks back over to open it. Rinse and repeat. Fueler radios into base, "the door on the fuel port of this challenger wont stay open, it's like it's spring loaded!" Let the fueler do his job, he'll close the door when he's done!