 In 2002, Harbin obtained Chinese certification for the new H410A variant of the Z-9, which features more powerful Turbomeca Arriel 2C turboshaft engines; Eurocopter issued official objections to Harbin's decision to continue production in spite of the license-production agreement having expired, leading to a period of highly sensitive international negotiations to resolve the dispute.An armed variant has been fielded by the PLA since the early 1990s as the WZ-9 or Z-9W, with pylons fitted for anti-tank missiles.These helicopters lack the maneuverability and survivability of a proper attack helicopter, and merely provide a stopgap during the development of the WZ-10.