Brief Description: Installed aft fuselage bulkhead and marked locatio
1. Located aft bulkhead 6B12-3. 2. Marked center of lower flange. 3. Made trial position on fuselage. 4. Trimmed lower lip to fit. 5. Drlled #40 pilot holes at either end of lower lip. 6. Drilled intermediate pilot holes #40 pich ~40. 7. Back drilled end holes into fuselage with #40 bit. 8. Back drilled intermediate holes with #40 bit. 9. Opened holes with #30 bit for A4 rivets. 10. Using marks on center of lower flange, located center of remaining two bulkheads (6B12-1, and 6B12-2. Marked on fuselage.
