TURIN,
Thnks for the headup... I still have to get that book into my little library.
I've seen that quote before.
Dr. Hooker was right of course.
I think we'll never know what Iran Air's reasoning was......
Even with the vastly inferior infrastructucture in the Middle East at the time, it would seem to me it would have been much cheaper to station enough GPUs and ASUs at their various destinations (only two aircraft, after all), rather than go for an airline-specific APU fit.