Brief Description: Prepared installation of Wing Root Doubler
1. Removed vertical mounting rivets on wing ribs 2 and 3. 2. Clamped wing root doubler 6ZU1-2 into position. 3. Back drilled existing holes in spar through doubler with 3/16, 1/4 and 5/16 bits, respectively. 4. Holes had bolts placed in them to aid aligment as they were added. 5. Removed bolts and clamps. 6. Removed 6ZU1-2. Cleaned and primed back surface.
