a method and an apparatus for carrying out the method for installing an especially dome - shaped pressure bulkhead on a one - piece , substantially conical rear section for an aircraft , wherein said rear section includes a connection area and an end area . the method involves the steps of horizontally accommodating a prefabricated rear section in a horizontal support ; inserting the rear section into a pivoting frame ; pivoting the rear section into a vertical position using the pivoting frame , wherein the connection area of the rear section points upward ; horizontally placing and centering the pressure bulkhead on the connection area , and joining the pressure bulkhead with the rear section in the area of the connection area .