the engine core fits in the An-124, because that’s how Boeing currently gets it from the GE plant in Evendale OH (suburban Cincinnati) to the Everett factory; as YVR states, the issue concerns an engine replacement at an outstation, because the fully built-up engine (with the nacelle and fan cowl in place) doesn’t, so the affected airline would be looking at surface transportation or having to set up additional engine buildup tooling and equipment on site