Abstract: An arrangement for actuating a closure element that is movable to selectively close and open up an outlet opening of a tank, which can be received or is accommodated in an aircraft, of a device for dropping water for firefighting. The arrangement is formed with a Geneva drive mechanism and makes it possible for the closure element situated in an opened position to be closed to close the outlet opening in a closed position, for the closure element to be locked in the closed position, and for the closure element locked in the closed position to be unlocked for opening the closure element, when the tank is full, to release water. A device with the arrangement for dropping water from an aircraft for firefighting purposes and an aircraft with the device are disclosed.

Abstract: A pipe element suitable for use in a fuel system of an aircraft comprises an inner pipe and an outer pipe sealingly surrounding the inner pipe and connected to the inner pipe. The pipe element is constructed in one piece and is produced by a 3D printing process.