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Michaels Web Site
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Date: 5-1-2011
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Number of Hours: 1.50
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Manual Reference:
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Brief Description: LEFT wing walk
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Worked on the wing walk. Did some head scratching for a good 15 minutes to figure out how to locate the holes.
1. Pull out the clecos at the upper aft skin where the wing walk goes. Also pull out all the clecos down the entire wing spar, so the aft skin can be lapped OVER the leading edge skin. That way the long root doubler that goes around the leading edge can be laid loosely over the leading edge skin (see photo #2).
2. Align the forward and aft edges of the wing walk and clamp/hold in place.
3. Use a thin tip Sharpie to trace around the insides of the aft wing skin holes, thereby transferring their locations to the wing walk (photo #3).
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Note: At this point it is, as far as I can see, impossible to wrap the rest of the root doubler (that's the long skinny part of the wing walk) around the leading edge and to the underside of the wing. That's because the root doubler needs to be located under the leading edge skin to transfer the hole locations. But with the way the skins overlap, and because of the severe but precise bend required at the leading edge, it looks like I will have to:
a. wait until I pull off the leading edge wing skin
b. then I can cleco the wing walk to the outside face of the aft wing skin (where it belongs) and thru to the ribs,
c. then I can bend the root doubler around the leading edge,
d. then reinstall the leading edge skin (with the aft LOWER skin lapping over the leading edge skin)
e. and finally transfer the hole locations from the leading edge skin and the aft lower skin, to the doubler
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4. Remove the wing walk
5. Carefully pilot drill then up-drill the holes in the wing walk, using the sharpie marks to locate and center the holes.
6. Place the wing walk on the wing and cleco into place to check the alignment.
7. Success! Everything clecos in place!
More pictures on the next page.
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Wing walk placed under aft upper wing skin
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Instructions say to leave 5/8" from the edge of the skin
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Locations of wing skin holes transferred to wing walk.
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