Thanks, Chris ! I sorta figured the resident Army Aviation member might assist.
I've run into a snag, though. While working on KGTB in FSX (for the scenery) I get a CTD about 10 seconds after you enter a flight.
And it doesn't matter where (location in the world) you start. I've stripped my FSX of almost every UI, AI, scenery, addon. Restored the FSX.cfg, thinned out the dll.xml. Finally found that if I removed FSUIPC every thing works (except what needs FSUIPC to function)

Restored FSX back to original with all addons, etc. and no FSUIPC - no CTDs. I've removed and reinstalled FSUIPC and still CTDs. I've removed and installed the
very same FSUIPC from my P3D and no CTDs with P3
I'm stumped. Maybe someone will read this and have a clue.