And then there is the questions about what happens to the "problematic" engine. By the way why they did not try to fix it and when is it going to be used again?
I'm sure they'll load the broken engine back on the Antonov and fly it to wherever Swiss has their GE90 maintenance done. Repairing an engine on-site is seldom practical - big turbine engines require very specialized tooling to disassemble below the module level. Plus they apparently found debris in the oil - regardless of the source they'll need to tear down and flush out the oil system to prevent the debris from causing new problems.