During the filming, one of the Pilots, named Horst Selter, one of the actual Pilots used from the Luftwaffe was killed during the filming by plane crash. The broken propeller exists also. His brother Rolf was also a Luftwaffe Pilot, he was a Staffel-Fuhrer (Squadron Commander) in Kampfgeschwader "Boelke", shot down and killed over Tarnopol, Ukraine, on March 30, 1944, while flying an Me 110 bomber.