All of these pilots were killed in late 1944. That was a period when the average survival time of new pilots was about 2 missions, according to one source, and a few weeks, according to another. There was almost no fuel for training, but there were plenty of aircraft, so the Luftwaffe kept sending pilots up to be slaughtered.
That explains the 19 years old. War = waste + tragedy.
There is some discussion of this period in my new paper, starting about page 92:
http://art2science.org/2013/07/16/no...-ww2-aviation/