- Match drilled the rear spar doublers - Deburred the rear spar, the doublers, the aileron hinge brackets and the skins - Assembled the aileron hinge brackets - Incorporated SERVICE BULLETIN16-03-28 into the aileron hinge brackets - Primed all parts and skins - Riveted skins to the ribs and spar - Riveted aileron hinge brackets to the rear spar.
