TVOC had eight bagged and tagged zero timed engines for XH558.
Of the four that were originally put into the aircraft during the major, two were removed on advice from Rolls Royce for precautionary reasons and replaced, and two of the original remain in the aircraft.
They still have two bagged zero timed engines to use but it’s still publicly unknown whether the two that were removed will be allowed back into service at a future date.
If they do have to change two this time round, it will of course mean that they would currently have no airworthy spares, meaning they could not afford a single further engine failure or it’s game over!
Unless of course if either of the originally removed two units were given the all clear and fit for flight label or, and this would be equally preferable, that RR decided that they would carry out overhauls for them.
I don’t think there’s any way to overhaul the Olympus now, at least not without it being prohibitively expensive.
AFAIK, your Vulcan man Pleming stated at a meeting I attended, that RR told them they would not be carrying out any overhauls!
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