This morning I separated the step support angles and nutplate brackets. I cut the angles to length by separating them at the indicated hole. I cut 2-angles down to 1" in width. I also used the micro countersink to prep the brackets for the installation of the nutplates. I then deburred the edges and installed the nutplates. I clecoed the seat support angles to the seat ribs and match drilled the #30 holes in seat rib bulkhead to the seat support angle
After match drilling the #30 holes into the support angles I final drilled the ¼" hole in the outboard bottom support angle and temporarily attached the steps. I then matched drilled the ¼" hole at the top of the step attachment point.
I removed the steps from the bulkhead and removed the bulkhead from the ribs. With the support angles attached I inserted a bolt in the nutplate bracket and then clamped the bracket to the support angle attached to the bulkhead. I match drilled the holes in all 4- brackets.
I then primed the support angles and the nutplate brackets.
I riveted the support angles and nutplate brackets and bulkhead to the ribs. I set the step floors in place for reference.
