...but I wonder if most of your F27 flying was on the US built Fairchild F27 and possible build to a better standard than the Dutch ones?
In Africa and in Europe, the Fokker F27 had pneumatic system that really did leak air ...
Personally operated both the Fairchild and Fokker designs in the middle east/Africa areas, and found no undue problems with the pneumatic systems in either.
As a corporate aircraft, we had superb maintenance.