Look the Russians kept Mir going for a good 10 years longer then they should have. The russians are nuts and bolts kind of guys. Besides they are not stupid. As for the L-1011 well when its all said and done its an airplane. While I never flown an L-1011, I have ridden in one on several occasions. Besides how you define airworthness, may not be what the Russians determine to be Airworthy. I don't know who bought this airplane, but anybody who can afford to do so, are not as dumb as you would belive. He or they would have gotten the issues of training parts and mantaince all sorted out before the sale was even concluded.