Dunno if the insurance is at Lloyd's, but I am pretty certain that wherever it was placed, a war and civil war exclusion clause would be prominently attached (if insured in the west). I am sure even the Russians have been very aware of the rebels and civil war.
Insurrection, rebellion, riot and vandalism etc may also be excluded. I would be interested to hear just what happens - were the aircraft owned outright, or by lease?
Whoever actually owns them, may be out a few bucks!