UNLOCK HANDLE - The pivoting posts of the Handle are inserted into the Lower Body Assembly underneath the Engine Assembly. To access these posts you will have to remove the Main Body Cover, the Engine Assembly and the Wing. To free the Cover, unlock the Handle by pushing up in the two locks on either side of the Handle. They just slide up out of the slots in the Cover.
POSITION NEW HANDLE - Place the new Handle so that it extends straight out from the front of the Lower Body Assembly. In this position the keys on the pivot post should line up with the keys in the holes. Push the pivot posts into their holes to secure the Handle. Move the Handle up to a half-way position to ensure that the posts are fully engaged.