New US Air Force MH-139A chopper grey Wolf is at hazard of failing to meet the "operational efficiency requirements" – says the U.S. Department of defence report. Machines designed, inter alia, to defend American ballistic rocket launchers with atomic warheads are a specially modified variant of the Leonardo Helicopters AW139. Machines should operate from 2021 but are inactive moving tests and tests. Problems are related, among others, to corrosion, ballistic protection and even the anticipation to prohibit declared landing with essential equipment.