I note the report needs a little editing.
It contains the words :-
"...... The autothrottles commanded an increase in thrust from both engines and the engines initially responded. However, at a height of about 720 ft the thrust of the right engine reduced to approximately 1.03 EPR (engine pressure ratio): some seven seconds later the thrust of the left engine reduced to approximately 1.02 EPR. The reduction in thrust on both engines was the result of a reduced fuel flow and all engine parameters after the thrust reduction were consistent with this. ....."
and
"...... and the engines, in order to understand why neither engine responded to the demand increase in power when all of the engine control functions operated normally. ....."
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But seriously, I am amazed that the reduced thrust was so similar 1.03 v. 1.02 EPR !