Flush patch

2. flush patch-

Tools-same as to what we need for surface patch.

What we do;
Calculate ed,rd,nr n rl. Cut the sheet metal following the diagram of flush metal on a piece of sheet that patched onto that surface. Filling it, (Note:make the center punch befor drill) make a hole, (the plug and skin) with diameter of 3/32 inch. On the skin, make countersunk with using the countersink drill. Then rivet both skin and patch. At the center, rivet the plug onto the patch.

Once finished, clean the flush patch with the soap. Soak it in the alodine to prevent it from corrosion for 5 minutes. Clean the flush patch with water and dried it well

The skin countersink is looks like 'flower'- does happen because of unpropagated adjustment and maintaining the countersinking drills to the skin.

Once finished, clean the flush patch with the soap. Soak it in the alodine to prevent it from corrosion for 5 minutes. Clean the flush patch with water and dried it well

Next---> will be Door Access panel