May 9, 2017 Accident Investigation Board finds lapse in maintenance procedures contaminated VC-25A oxygen system Contractor mechanics failed to follow proper maintenance procedures leading to the contamination of the oxygen system on an Air Force VC-25A aircraft undergoing regular heavy maintenance, according to an Accident Investigation Board report compiled by Air Force Materiel Command.The contamination
April 20, 2017 Presidential aircraft touch down Presidential aircraft lands here during a maintenance cycle.