Final-Drill #19 all the holes common to the S-601-1 Spinner and the S-603 Spinner Front Plate, common to the spinner and Spinner Back Plate Assembly, and common to the spinner and S-1002 Backing Plate.
Remove theS-601-1 Spinner. Drill #40 holes in the Spinner Back Plate Assembly, the S-603 Spinner Front Plate, and the S-1002 Backing Plate for the rivets used to attach the nutplates.
Machine countersink the holes drilled in the previous step for the heads of AN426AD3 rivets.
Machine countersink the holes drilled in the previous step for the heads of AN426AD3 rivets.