Quote:
...engine control commands were performing as expected prior to, and after, the reduction in thrust.
By what definition were they responding as expected AFTER the reduction in thrust?
I read this to îndicate that the input values to the FADEC were correct for the Thrust Lever position.
"engine control commands" to me is the thrust request. Not the thrust obtained.
I think this rules out any Auto throttle or TLA faults and leaves just the fadec or the engine hardware as culprit.