Brief Description: Completed riveting all the Rib Stiffeners A-710 to
4/27/2009 Section 21-3 Step 8. Completed riveting all the Rib Stiffeners A-710 to the Aileron Skins (36 total) by the “back” riveting method, leaving no dents on the thin upper aileron surfaces. Time only 2 hours for both ailerons.