輕微上下作動右副翼，並觀察左副翼是否沿著相反方向移動，以及聽出聲音有無

輕微上下作動右副翼，並觀察左副翼是否沿著相反方向移動，以及聽出聲音有無異常，反之如此

結果 (英文) 1:

Actuating the right aileron down slightly and observe the left aileron moves in the opposite direction, and hear any abnormal sound, so conversely

結果 (英文) 2:

Move the right wing slightly up and down and observe if the left wing is moving in the opposite direction, and hear if the sound is abnormal, and vice versa.

結果 (英文) 3:

Slightly move the right aileron up and down, and observe whether the left aileron moves in the opposite direction, and whether the sound is abnormal, otherwise