Avionista
I think they have made a fairly accurate technical statement. A typical autothrottle system normally commands the throttles between an upper and lower limit. The lower limit is slightly above idle. In the case of this accident, the autothrottle computer responded correctly to the faulty rad alt input by overriding the lower limit and retarding the throttles to the full idle stop. This allows the thrust reverser to be selected upon landing. At that point, the autothrottle would normally disconnect through the thrust reverser selection.