Completed step 8 page 21-10 – riveted F-1203B-L and F-1203B-R bulkhead flanges to F-1203A bulkhead aft side using LP4-3 rivets per Figure 5. Completed step 10 – riveted the F-1203C stub spar receptacle and the F-1203D-L stub spar receptacle support to the F-1203A bulkhead per Figure 5 with 2 – AN470AD4-7 rivets – repeated for the right side with remaining F-1203C stub spar receptacle and F-1203D-R stub spar receptacle support. Completed step 1 page 21-11 – separated two sets of F-1203E bulkhead doublers – deburred and primed.
