Started fitting the elevator horn and went straight into problems again. The elevator horn has pre punched holes. The problem is that the inner most holes are punched at least 3-4/16 too far in, so they interfere with flange of the E-409 rib. I didn't notice that before the spar and rib already was riveted together. Had to drill the rivets out and file 3/16 off the flange, and rivet together again. From the drawings and manual it is obvious that the horn originally was not pre-punched. Not a big deal, but still.
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