Engagement below that number resulted in some rather significant pitch attitude excursions.
Jack, saying that it the AP GA can lead to a pitch attitude excursion does not mean that the root cause of the accitent is due to the AP:
I understand your feelings on this occurrence, but honestly it seems from the pictures that the A109E in subject was going anyway to have an hard-landing for unclarified reasons (no visibility?):
the AP engagement could have only have worsened the scenario under certain speed conditions, but definitely the accident responsibilities cannot be linked to the AP ...