[Old]

I flew the twin engine turbine 337 in Vietnam late 69 to 71 worked for Air America, than Evergreen till 99. There was 6 with our group. My main Aircraft was the Fairchild with the Garret 337 engine. First was the 25aa than we installed a 101 with a lot more HP.
I think there was a lot more 337T's than our 6, they arrived in a container and we put them together. The original engine was the C-17, we converted all to a C-20B. We only had Hot Section Kits for a C-20. No matter the Prop gearbox made metal in 600 hours running.

All of the equipment was to be left behind for the Royal Tie Air force, but not all stayed, ever heard of Marina.

Regards
Old Bold Pilot