Rick Jones wrote:

Jeff Findley wrote:
It's looking, to me anyway, like something in the pressurization system
for the 2nd stage failed and caused the sudden O2 tank overpressure.

Did someone call for a cryo-stir?-)

The second stage had just started engine prechill.

--
Mvh./Regards, Niels Jørgen Kruse, Vanløse, Denmark