A nail gun has a free end 19a and central potion of a trigger arm 19 positioned within a trigger 11, on an upper end 12a of a safety portion 12 and at a plunger 17, respectively. A cover member is provided at the first end plate to cover the group of the fuel gas system devices. The radiator has an inner surface and an outer surface both defined therein. The SLS is not dependant on the pilot specifically selecting this mode, but rather engages and disengages in response to flight control system status and how the aircraft is being maneuvered. The referenced read operations can be initiated at the same time or prior to that of the destructive self-referenced read operation.