In this video, we learned how to repair a crashed 3D helicopter. If you have a crashed helicopter that isn't flying or is flying off center, repair it. You will have to have some knowledge of how to repair helicopters, and know which part is broken. Repair the parts that are broken and when you are done you will need to replace all the parts that you previously removed. After you are done with this, you will be able to turn the helicopter back on and test its flying abilities. If the helicopter is flying correctly, then you were successful in your repairs!