as is clear from the CVR transcript, RETARD, RETARD was said by the onboard computer, so apparently they didn't pull back the thrust lever(s) far enough....right?
question to those in the know:
the two "FWC retard" at 21.6 and 23.0 right after the twenty call I'd expect to be standard, but what about the "GPWS retard" at 25.5? and IMO it is likely the pilots didn't hear / recognize this third retard, what do you think?