Quoting Mr. Purvinas:
"In this case, we're talking both engines carking it at same time. At that stage the aircraft is tilted at a certain altitude so when the fuel moves back into the tanks, it may expose the fuel pumps to water which is contained in the tanks," he said.
A small amount of water is not uncommon in fuel, Purvinas said.
"When you're putting in a hundred thousand kilos of fuel, there is a small component of water but if that all rises to the top of the fuel tank is exposed to the fuel-pump intakes at same time, that is when you may have a problem at the same time on both engines," he said.
Well I guess Mr. Purvinas with 20 years of avionic experience does not need to have any knowledge of the rules of gravity and the S.G. of fuel.
