Quote (NSEU) :-
......... The Rolls Royce Trent has a fuel pump and a Fuel Metering Unit. The pump is mechanically driven. The FMU is further downstream and simply meters whatever fuel comes out of the pump (according to EEC electronic input).... and delivers this metered fuel to the spray nozzles in the combustor. ........
unquote
So, the Fuel Metering Unit should have its own data recorded - and hence shouldn't the AAIB Special Bulletin have comented on its staisfactory performance ? The bulletin comments that the correct commands were given by the EEC, but not what data was being recorded by either the FMU or spill valves as to what actions they were performing.
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