"Drilled #40 pilot holes on inboard forward skins. Marked and drilled #40 pilot holes on inboard lower skins. Turned elevator assembly over. Drilled all #40 pilot holes through ribs T07-2 & 3 on upper skins. Marked and drilled all #40 pilot holes on inboard root ribs on upper skins. Outside measurement of 78"" was maintained."
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