Spannerz
What I'm after is the masticating ability of the gears in the HP to blend the Ice back into the Fuel. Bernd posted a while back that GE's HP is upstream of the FOHE.
If it takes different metallurgy for the pipes in the FOHE, or a pressure sensor in the oil portion of the cannister, or a bypass around the FOHE downstream the HP and directly to the nozzles, these are design considerations. It seems to me, though, that if the Oil gets into the Fuel system, it will deplete and cause engine damage anyway. One way round this HP FOHE is a partial bypass. Why direct 100% of the Fuel through the FOHE? Why not a portion of it, enough to cool the oil only.
The FOHE has been shown to be the weak link. Are there others? The Ice picture from the Reports is daunting, no doubt. There remain two issues:
Refitting the Trent/777 immediately, and an intense program of Fuel Research.