The fresh US Air Force MH-139A grey Wolf chopper is at hazard of failing to meet “operational efficiency requirements,” the US Department of defence study reads. Machines designed, among others, to defend US ballistic rocket launchers with atomic warheads are a specially modified variant of the Leonardo Helicopters AW139 helicopter. The machines should be operational from 2021, but tests and trials are inactive underway. Problems are related, among others, corrosion, ballistic protection and even the anticipation of taking the landing ship declared in the contract together with the essential equipment.