Here you go...
AUTOTHROTTLE
The autothrottle must not be engaged for take-off and landing.
Minimum height to engage autothrottle in climb after take-off ........................................ 400 ft
Minimum height to disengage autothrottle at landing....................................................... 50 ft
The autothrottle must be disengaged for go-around.
In icing conditions, during approach, disconnect the autothrottle if the minimum N1 limitation
cannot allow to maintain the approach speed.