Use this guide to replace a broken propeller on your Parrot Bebop.
You will need the Bebop propeller removal tool. Be sure to place the propellors on the proper engines. Propellers with central holes fit over the engines with a central screw. Flat propellers fit on flat engines. Propellers with central screws should be diagonally opposite each other, and propellers without holes should be diagonally opposite each other.