Brief Description: Preparing outer wing surfaces for bonding
This step was performed at Lancair during the Builder Assist program.
First, wing skins have been checked against remaining wing structure for fit. They lined up well, so they were then removed and placed on the side for now. Fuel tank sealer was inspected for pinholes, porosity and any other type of damage that could potentially lead to leaks. Special attention was paid to transition from spars and ribs to lower surface skins. Four (4) areas were found to have minor pinholes so they were abraded and touched up with additional fuel tank sealant.
Next, all mating surfaces have been sanded with 40 grit sandpaper, and afterwards cleaned with acetone. There are two (2) areas on upper wing skins that were covered with fuel tank sealant that had to be removed and abraded since they made contact with points on lower sections of the wings. These areas are on the inner lower corners of the speed brake housing that is part of the upper wing skin.
On the dry section of the wing tip, T/E, two foam strips are shaped and bonded in place to create a dam for adhesive that will be placed in between during closeout. This dam prevents adhesive from being excessively squeezed out.
