Assault Suit Leynos

In the middle of stage 3 is a huge enemy dropship with multiple destructible parts. Equip your heaviest weapons such as the bazooka, missile launcher or D-D, and unload on all of the different parts. Once they are all destroyed you can attack the circular structure at the top of the ship to destroy it entirely. This is not difficult, but you may want to have at least one armor upgrade equipped as bullets and smaller enemy ships will be flying at you constantly. You will also need to keep an eye on the countdown timer to ensure you can make it back to the Versis in time.