If the data provided
here is accurate, it suggests the aircraft was under manual control. The V/S and A/S fluctuations are not consistent with George's typical finesse.
Why no voice comms? If the quick don O2 masks were required, it could be the crew missed switching on the mikes - so while they may have been keying there would have been little or no voice transmitted, since their hot boom mikes would be hanging about or on the floor.