Am I alone in wondering exactly what the problem here is? Is a "cut and shut" chinook really a problem? Seems to me to be good use of resource!
ZA704 lost its aft plyon during an accident in Oman, not an engine, always lends credibility to a story to have the facts right. Being an original Mk 1, its airframe was essentially a C model and as Boeing didn't make that airframe structure anymore, the easiest repair was to use the frames from another C model- the ex-Argentinian one.
No scandal, we have one more Chinny than we would have otherwise, it flies just like the rest!!!!!!!!!!!!!!!!!!
PS Where did RogerK get those figures from - the Observers Book of Aircraft?