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Indeed Sooty the GE90 does have an interstage LP filter which would go into bypass if clogged with ice. When in bypass the ice can migrate and block the bypass loop, cavitating the HP pump and ceasing all flow to the FMU.
Edit.
Having had a closer look at the GE90 schematic I was mistaken here, the LP filter (and hence bypass) is in the HP loop so the chances of ice ever getting there is slim as it would get mashed in the HP Gear Stage. However there is no bypass loop for the interstage strainer
