Deburred Hinge Brackets and Rear Spars Pg.14-2 Step 2: Machine Countersunk 120 degrees the Stub Spar Channels. Step 1: Clecoed the Stub Spar Doublers to the Stub Spar Channels. Step 3: Machine Countersunk 100 degrees the the inner hole of the Stub Spar Assys. Step 4: Riveted the Stub Spar Assys. with three flush rivets at the inboard end.
