Got back to aileron tasks and items missing during wing construction because SB16-03-28 was published just before installing the aileron hinge brackets and aileron gap fairings in both wings, so it gave me time to stop there and work on other items. After getting the SB16-03-28 pieces ready, I riveted the LH W-414 outboard and LH W-413 inboard aileron hinges to the LH rear spar, and installed the Service Bulletin reinforcement back angles for the inboard hinge. Service Bulletin SB16-03-28 has been complied with for LH Aileron according to SB page 11, Step 26.