Bernd
Just because Boost pumps are operating, does this mean suction feed was not compromised in other ways? The 777 was designed to operate sucking Fuel only, w/o pumps. The cavitation on the High side of the HP engine pumps points strongly to a lack of available Fuel, which means that demand was overpowering supply. To me, this means that the pumps/filters/flow somehow caused the problem, in other words, if the aircraft can run just fine (By Test) at all settings on suction alone, what in addition to suction only would cause the FAA to distribute a Rule that referenced "Dual Flameouts"? AoA? Fuel Viscosity? Fuel Temperature? Sensing Failures? #1 I feel this incident is not complicated, #2 AAIB/FAA have had the solution for some time, #3 Proper time is passing for reasons other than the complexity of the challenge.
Airfoil