leak in tube above copper fitting

It was fairly easy--disconnect the water supply, remove a bunch of screws on the lower back panel, screws from the clips that hold the tubes close to the back and screws that attach the water filter inside the fridge and disconnect the tubing from the water supply to ice maker. Pull the entire feed (tubes and all) through from the inside and un-clip from the water filter housing. I had to cut the foam carefully so that I could reuse it (it helps to seal the hole that the tubing fits through and there was not included with the part). Clip in the new part, thread the tubes back through, reconnect the water supply and ice maker feed. Turn the water back on and check for leaks. Easy!