AerCap, the Irish-based aviation leasing giant, is clear about what it is owed by insurers for the 113 planes and 11 engines confiscated by Russian airlines: $3.5 billion, plus interest. Documents filed in the High Court in London on Friday show AerCap is suing AIG and other insurers on its all-risk policy for $3.5 billion, reports Insurance Insider, a trade publication. The aircraft have been caught up in the war. For the Russian state, they are points of leverage over the west. It has been reported that the Russian cargo airline Volga-Dnepr tried to return its aircraft to AerCap, but…