Fittings located in the opening of each main gear well:
A.A.Are intended to provide automatic braking to main gear wheels during retraction
B.B.Provide positive unlock during main gear retraction
C.C.Are intended to provide protection to wheel well components during gear retraction by preventing a gear with a spinning tire and loose tread from entering the wheel well
D.D.Allows the landing gear transfer unit to use hydraulic system B pressure to raise the gear if hydraulic system A fails.
正确答案是C