On Sun, 24 Feb 2008 12:15:07 -0800 (PST), Andrew Sarangan
wrote:


I have flown airplanes with a fuel sump drain that would not close
properly. This always happened when I took a fuel sample from the
sump, so it was was easy to notice it and fix it. But if it can happen
on the ground, it could also happen during flight.

Your sump re-opened itself?

There's a difference between not closed, as in you just removed the
jar, and a sump opening by itself.

I'm not saying it can't happen, but the two conditions are very
different.