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Cowboy's RV-10
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Date:  9-19-2010
Number of Hours:  7.00
Manual Reference:  13-3
Brief Description:  Left & Right Spar Lower/Upper Countersink

13-3:
Step 6: Skip until after we spot prime spar.
Step 7: Machine countersink the wing access plate attach screw holes in the same manner as the fuel tank attache screw holes using the aluminum angle below the holes for countersink pilot stability. The wing access plate attach screw holes were match drilled with the aluminum angle using a #30 bit and used #30 countersink cutter to finish the holes. I still think this is the gouge way to countersink these large hole as they came out near perfect.
Steps 1,5, 2, 3: Repeated for the top flanges of both spars. Skip Steps 4 until after spar spot prime.
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