If the technical staff you refer to, were the special breed found only in South Africa, going by the name of 'engineers' - then yes, part swapping is the most likely diagnosis as that is about as far as their skills go.
If however, they were mechanics, it might have been a double engine change. With good chance of success I might add.
^ re-reading that, I know it makes little sense, but to me and anyone else who thinks this term 'engineer' is a little far fetched...you will know what I mean.
