The fuselage sides were clamped into the temporary firewall (rear of fuselage) and bulkhead F22 was clamped in position at the front of the fuselage such that the top of F22 is at WL 23 and the centreline of F22 is aligned with the centreline of the jig. This will ensure that the top of both fuselage side longerons will be at position WL 23 once secured to the temp firewall and the front bulkhead F22.
