Pg. 21-02 Step 4: Riveted L & R Baggage Ribs to the Center Section Aft Bulkhead and L & R Baggage Floors with manufactured heads on the bulkhead. Step 5: Dimpled 12 nutplates and riveted them to the Baggage Ribs and Baggage floors. Pg. 21-03 Step 1: Riveted the F-1206A Bulkhead to the Fwd L & R Baggage Ribs. Step 2: Riuveted the F-1206A Bulkhead to the F-1206G L & R Baggage Ribs and F-1221 L & R Baggage Ribs. Step 3: Dimpled holes in the top flg of the F-1206H L & R Baggage Ribs. Step 4: Riveted the F-1206H L & R Baggage Ribs to the F-1206 Bulkhead.