Pinched the aft edges of the HS-1217 L&R and laid it flat on the aft edge of the main skins. Cleco'ed the aft skin to the main skin and the aft ribs.
Match Drilled #30 the holes from the aft skin into the aft ribs as per Figure 4 on page 9is/U-08. Removed the skins, deburred the holes, cleared away all chips.
Riveted the aft skin to the aft ribs and the main skin using the rivets LP4-3.
