Pg. 21-11 Step 4: Riveted the Control Column Mount Assys to the F-1203A Bulkhead. Step 5: Riveted four nutplates to the sloping flanges of the Control Column Mount Assys. Pg. 21-12 Step 2: Riveted seventeen nutplates to the F-1203A Bulkhead. Step 3: Riveted the F-1203J Bulkhead Doublers to the F-1203A Bulkhead. Pg. 21-13 Step 1: Clecoed the F-1203A Bulkhead Assy to the Seat Ribs and Floor Supports
