dxzh post #384
Not a bad scenario with commendable contemplation of many inter-relating aspects to line up the holes in your Swiss cheese BUT
Approximately how much water condensation do you contemplate will occur during the venting of an emptying CTank at heights where the vented air has very low specific humidity and which empty volume will be offset to a large extent by almost fully saturated fuel vapour. There will be extra venting with air during descents but my guess is that the most water you might get from the vented volume would be much less than enough to fill a tea cup.
Now there is a challenge to our meteorological boffins. Is my reasonably well educated guess better than yours?
And while you are about it how close might it be to a vacuum when jet fuel at sub zero temperatures C starts boiling? This is significant to the onset of cavitation at the HPressure fuel pump inlets.