This caused Causation the autothrottle to decrease Cause_change_of_position_on_a_scale the engine power to idle during approach Arriving .

Boeing has since issued Expressing_publicly a bulletin to remind Telling pilots of all 737 series and BBJ aircraft of the importance of monitoring airspeed and altitude , advising Convincing against the use Using of autopilot or autothrottle while landing Self_motion in cases of radio altimeter discrepancies .