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Date:  5-7-2009
Number of Hours:  2.50
Manual Reference:  Section 8; DWG 27A
Brief Description:  Aligning Horizontal Stab for 0 Degree Incidence

Before I drilled the holes through the aft horizontal stabilizer and vertical attach bars, I built an alignment jig to set the stabilizer at zero degree incidence. The jig is a simple wood block, a spacer, and a big tent stake. The block of wood and the spacer were exactly the height I needed to get the tent stake to align with the tooling holes in the horizontal stabilizer (picture 1) I just had to raise the aft section of the horizontal stabilizer to get the alignment correct by moving my jig to all three of the alignment holes (picture 2). Once I shimmed the stabilizer and the tent stake lined up with all the tooling holes, I marked and drilled the bolt holes with a 1/8" bit for a pilot hole and followed this with a 3/16" bit. Then I deburred the holes, installed the bolts in the vertical stabilizer bars, torqued to the proper setting. In the last picture you can see the tooling hole and the the installed bolts in the vertical bars.
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Zero degree alignment jig in tooling hole

Zero degree alignment jig in tooling hole

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Jig/tent stake in mid-tooling hole

Jig/tent stake in mid-tooling hole

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Aft tooling hole and Bolts installed

Aft tooling hole and Bolts installed

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