Courtney
^^^Sadly nothing to do with money any more. The manufacturers won't support the engines. That's it. Sadly.
Quite right too, they have already extended the engine life once and when do you stop, when one chews itself out through the wing?
You have to remember that no Olympus aero engines are built anymore, there is no tooling, no spares, and possibly not even a full set of drawings, also engines have an overhaul life, even when in a wrv bag, not that there is any of those available either.
Sad as it is, it was always going to happen sooner or later, and better a safe sooner than a disastrous later. Don't forget a companies share price these days is tied to their reputation and the Vulcan going down at a show would be a disaster in both the loss of life and for any company that ignored the blatantly obvious.
Excellent show BTW.