sooty
The Icing of Fuel was explicitly shown in the schematic for GE. It was not shown on the schematic from the same source for RR. I mentioned that before, and meant only that, not that RR hadn't addressed the problem as understood at the time. The presence of three separate HX on GE may or may not be more effective, and your noting that only two rollbacks have been documented for the Trent is quite valid.
airfoil