Brief Description: Machine countersinking fuselage parts
29-14, Step 9
Deburr and machine countersink all the #40 holes in the F-1015C-L and -R Middle Cabin Decks for the head of an AN426AD3 rivet. Deburr and machine countersink the holes that are common with the F-1069 Forward Side Skins in the F-1 013 Forward Fuselage Longerons, F-1046 Middle Fuselage Longerons, F-1004K Center Section Side Plates, F-1040 Upper Fuselage Channels, F-1041-L Lower Fuselage Channels and F-1042-L and -R Bulkhead Side Channels
Deburr and machine countersink the holes in the F-1005C-L and -R Bulkhead Side Channels that are common to the F-1070 Middle Side Skins.
A stack of longerons and ribs waiting to be deburred, countersunk, and dimpled