MU300A (#2009)
Let me write it once more, hopefully for the last time.
The RETARD function serves a purpose even when not on a Dual Channel approach:
The crew is on a Single Channel approach at some stage PF disengages the A/P but not the A/T. Instead PF deselects the speed mode with the A/T engaged.
Because Boeing doesn't want Min Speed Reversion to pop up during the flare and ruin the landing, the A/T are designed to RETARD at 24/27 feet (chose the right one)
Any questions?