I'm hoping something might come from a detailed environmental test of the fuel supply chain - no news yet...
The entire fuel manifolding from boost pumps to the engine interface has been removed intact from the left wing and is at Farnborough. It is installed in a test rig for simulation purposes.
Obviously, filtration difficulties would impact on the flow of fuel through aircraft filters, and I would imagine that the effect would worsen with decreasing temperture.
The filters have a bypass! The filter is monitored by the diff. pressure s/w which would send a discrete signal to the engine EEC
before the bypass valve opened.
The result would be a status msg. ENG FUEL FILTER L (R)