Re drop in fuel pressure - If there was an obstruction in the fuel supply between the tanks and the HP pump(s) the pressure in the pipework between the obstructon and the HP pump inlet would drop to hugely negative levels due to the suction caused by the HP pumps. Could this not cause rapid freezing of the fuel, especially if it had a higher than normal water content?
I accept that this doesn't explain both engines beinging affected at similar times etc, but I would be interested on peoples views on the possibility of fast freezing as described above.
My first post, so now crouching for the flames! I'm a PPL rotary pilot who has learnt pretty well everything about jetliner fuel systems from reading this facinating thread.
James