The BA 058 Boeing 777 crash caused me to dig into likely or possible reasons.
...I came across references to notices about FADEC problems with airliners taxying at low power settings in freezing fog having engine failures due to small amounts of icing affecting various pneumatic sensors.
... In the last 6 or 7 years several notices have been issued to modify bleed sizes and smooth out pipe bends and joints with some reference to the possibility of double failure due to similar conditions affecting 2 entirely separated systems
... This may or may not be relevant for the B777 twin,but does also call to mind the doubts about the Boeing Fadecs , of the RAF Chinook which failed to pull up in the fog at Kintyre
...Were the Fadecs of a similar design?
... Are these Icing notices worthy of bringing to attention and using in connection with the RAF enquiry and continuing appeal?