I clecoed the left aileron completely together in preparation for match drilling.
The aileron counterweight is a galvanized iron pipe that runs the whole length of the aileron. This has to be drilled to #30 for countersunk blind rivets.
The entire bottom of the spar (with the exception of the outboard two rivets) also has to be drilled to #30 for blind rivets because there is no way to reach inside and buck these.
There is also a hole that attaches the counterweight pipe to the nose ribs so that the pipe can’t rotate. This can be reached through one of the #30 holes in the spar after the trailing edge skin has been removed.
