I think that you are absolutely right there PDR1. They also took the decision to launch in reality not on the basis of a declaration by Morton Thiokol that the system was safe, but on the basis that it was not proven to be unsafe. That is a complete reversal of all good practice in aerospace safety. Nothing should fly unless the evidence, as best as you can have it is that it's safe - "not proven" (or "under investigation") is a totally inappropriate basis to declare something fit to fly.
G
Last edited by Genghis the Engineer; 13th Feb 2018 at 14:42.