you can control plane like this
plane Animate ["LeftGear", 0]
plane Animate ["RightGear", 0]
plane Animate ["RearGear", 0]
plane Animate ["NoseGear", 0]
plane Animate ["LeftGear", 1]
plane Animate ["RightGear", 1]
plane Animate ["RearGear", 1]
plane Animate ["NoseGear", 1]