In most designs the landing gear is held in a terminal position (be it up or down) by a mechanical lock, not by an actuator, no matter is it electrical, hydraulic, or pneumatic. The actuating system at the terminal positions of the gear is usually in power off state to save on-board power and not to overstress the system.
So, by damaging the upper lock it is possible to drop down the gear, which is modeled in the recent update.
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