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Date:  2-14-2015
Number of Hours:  5.00
Manual Reference:  Section 7
Brief Description:  Drill Right Wing Leading Edge

Inserted the W-408 rib and aligned it with the edge of the skin. Clamped in place and back drilled the flange through the spar, clecoing as I drilled. Used the 12 inch #30 bit and back drilled all the rib flanges through the spar. Prepared the W-423 joint pate by edge finishing, marking the plate 1/2 inch from the edge and marking minimum edge distance on the ends. Pre-formed the plate using the tank cradle and leading edge. Used a variety of tools to get the join plate inserted, squared up and showing 11/16 inch exposed on both the skin and rib side. Double checked all measurements and made sure the line was showing in the center of all the skin holes. Clamped the rib and join plate in position and match drilled the parts through the skin, clecoing as I drilled. Drilled all remaining ribs/spar to the skin, deburred the holes, moved clecos and repeated the process so all holes on top and bottom of wing are drilled and deburred on the outside. Made notations on the leading edge on drill/deburr. Extended the lines from the lower skin onto the leading edge for the tie-down hole. As on the left wing they intersected over the pre-punched hole. Drilled to 3/8 inch with the step drill.

Started on the fuel tanks by edge finishing the ends of the brackets and following the plans marking the Z-brackets. I remembered reading several posts on issues with these brackets and decided to do more research on tank construction before drilling any holes.
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Working W-423 into place

Working W-423 into place

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W-423 join plate clamped

W-423 join plate clamped

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Tank Z-brackets marked

Tank Z-brackets marked

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