Removed the canopy slide rail (it is only clecoed) . Countersunk the forward side of F-708. Installed 3 rivets (AN426AD4-5) between F-728A and F-706 as per DWG 26 Detail B. Drill 1/4" hole for C-664 threaded rod in F-706 bulkhead as per DWG 43 and installed rod temporarily. Install CS4-4 blind rivet in upper hole between F-728A and F-706. Re-cleco canopy slide rail.