After all the preparation, it was time to rivet and bolt the skeleton of center fuselage together as shown on DWG 25.


I drew a centerline on the bottom flange of the F-715 ribs. Starting at the aft face of the F-704 bulkhead I installed the F-716-L&R ribs using bolts and rivets as shown on DWG 22.
Time: 6 hours.