Removed protective vinyl, deburred, and countersunk two holes in each of two flaperon stops. Riveted one of the flaperon stops and pulley bracket assembly to the left rib assembly. Riveted seat rib to other side of pulley bracket asembly. Dimpled two nutplates and the corresponding holes in the right seat rib assembly, then riveted the nutplates in place. Riveted remaining flaperon stop and flaperon mixer arm assembly to the right seat rib assembly. Trimmed the called out seat rib by removing materuial, as directed. Removed protective vinyl from and deburred auto pilot (AP) servo doubler. Clecoed AP servo doubler to seat rib. Match drilled #30 and #12 holes from AP servo doubler into the seat rib, as directed. Riveted the AP servo doubler to the intercostal, as directed.
