Rivet keeper rivets at top landing gear box locations for L & R F-820 forward side skins. Used CR3214-4-04 Cherry rivets. Countersunk #40 and #12 holes in battery tray. Rivet aft end of L & R F-860C aft arm rists to F-807 bulkhead. Rivet L & R F-806A armrest bulkheads to F-806F gussets. Rivet L & R F-805B floor support angles in place. Rivet L & R outboard forward tab of F-860A armrests to F-804C center section. Prepped and primed fuselage parts and forward underside of fuselage.