Well I'm pretty happy that people are taking seriously the point i made. it does fit with the witnesses. I don't know the 135 operationally
and/but SS the answer to your question is: at the point where the fuel is becomming unuseable - which must logically be
at the top (not bottom)
of the remaining 95litres. (and a high unuseable is inherently different from a low unuseable, like the swimming pool) I can't say whether this results in a supply tank being filled with fuel foam or not, nor whether this foam gets to the engine nor how the engine will respond to being fed fuel foam, but it looks on the surface to be something not to be thrown out of consideration without some thought, fair enough? (ESPECIALLY as it fits the information available) Can you be
certain it is NOT a factor? If so that's good enough for me.