Smuj
The thinking, even at that time, was that the C130 had a finite design life, vastly short of that envisaged
I bow to your superior knowledge re the Corrosion Control Team at Colerne in late '72, but I was talking about the corrosion problem in mid '69 when the aircraft were only 12 - 18 months old. I am not aware that any other C130 operator had the same problem in which case the cause could hardly have been a design problem, could it? Unless not adding a manufacturer approved and recommended additive could be seen as a design problem.
I left the Herc fleet at the end of '71 so perhaps I have missed part of the story!