Completed removing the rivets holding the skin to the ribs on nose and main ribs, top and bottom. Used the universal rivet removal tool on the shop heads of the rivets holding the nose rib to the front spar. Drove out the rivet bodies with a spring punch and removed the nose ribs. Drilled the rivets holding the main rib to the front and rear spars and removed the ribs. Began removing the rivets holding the angle brackets to the front spar.