Brief Description: Rib to Fuselage Bulkhead and Bottom Skins
Sec 26-6 Edge deburred F-1019 - L & R, F-1020l & R, and F-1021-L & R. Final drilled and deburred #30 and #40 holes F-1019-L & R, F-1020-L & R, F-1021-L & R and WD-1008-L & R. Final Drilled #30 holes in WD-1008-L & R and F-1021-L & R.
Sec 26-7 Machine countersank #40 holes common to F-1076 in Aft Center Sectioin Bulkhead Assemble. Countersank #40 holes in F-1005A in Error and in Rib overlaps. Countersank #40 holes in F0134A Rib Overlaps ONLY.
Ref: F-1005 Countersank Holes Consulted Acceptable Practices and will drill the #40 holes countersank in error to #30 and dimple for AN426AD4-4 Rivets.
Match drilled #40 holes F-1077 and deburred. Match drilled #40 holes F-1076 and deburred.
