Tucked away 2 items below the Lufthansa HAM incident report in the
BFU document is the following item
12.3.2008 13:10 CET
B777-300 foreign registration (operator not specified)
The thrust levers were moved backwards and forwards very rapidly on approach to Frankfurt/Main.
According to the pilots, there was a delay in thrust increase.
An analysis of the flight recorder did not indicate abnormal turbine response.