William Milburn McClellan Jr, 71 of Beaumont California, passed away June 11, 2014. He was born in Windridge, Pennsylvania on July 21, 1942. William graduated from West Greene High School and received his Bachelors degree from the University Of Phoenix. He was married to Matsu Sato McClellan on September 1965. William worked as an Aerospace Engineer for the United States Air Force where he developed and created the AGPU for air crafts. His passion was in engineering which he applied to working on air planes. He is survived by two children William James Nyberg, Daughter in Law Sherrin, Sandra Valdez Son in Law David, Five Grandchildren William James Nyberg II, Emilee Marie Nyberg, Tiffany Matsu Brasington, Savannah Delphine Brasington, Valerie Marie Valdez, Two Sisters Jean Guthrie, Martha Klinedinst, and his brother John McClellan.