Brief Description: Drill Bottom of Aft Fuselage, Begin Deburring
Drilled all the open holes in the bottom of the fuselage, moved the clecos and drilled remaining holes. Per plans did not drill F-706 bulkhead or holes for longeron yet. Rolled fuselage back upright, removed left side skin and deburred all drilled holes. Edge finished the skin with files, emory paper and scotchbrite. Scuffed the inside rivet lines with scotchbrite.