A Boeing 777 flight from Beijing to London Heaththrow litterall fell in its landing. Both engines lost power. The air incident investigators were at a loss finding the cause of the crash. Everything in the flight from the flight data recorder seemed to be 100% A. OK
The AIIB of British Airways listed nearly a dozen possible causes but could not find any.
Then they though of things aoutside of the box - ice. But they still could not find any scenario that caused fuel blockage when the plane flew at subzero temperature as it happens when a plane flies in such cold routes ie Beijing to UK. They were able to duplicate the event when suddenly there was sudden demand for power. Ice thast had accumullated in the fuel pipes suddenly rushed to the openings of the heat exchanger that blocked fuel flow.
Solved
