Thursday, January 11, 2018

Wings, Rear Spar (Part 8)

I let all the parts dry overnight following Akzo priming and now I’m ready to start riveting.

Below is an excerpt from the plans supplied with the Service Bulletin.  This details the assembly steps for the Left and Right Aileron Hinge Brackets.  Based on the plans, there are three different rivets used on this assembly.  There are AN470AD4-11 (x3), AN470AD4-7 (x6), and AN426AD4-7 (x3) rivets used to assemble each Hinge Bracket.

These are the Left and Right Inboard Aileron Hing Brackets clecoed together.....

And after receiving the appropriate rivets.....

After completing the Inboard Hinge Brackets, I moved on to the Outboard Hinge Brackets.  Below is the excerpt from the plans that details the assembly instructions.  The first step is to “press” the COM-3-5 Bearing into the Doubler.  The plans provided very good directions on how to accomplish this step. First, I used hand pressure to initially set the Bearing in the hole and make sure it’s going in straight.  Then, as specified in the instructions, I used a 11mm socket (pressing directly on the bearing) and a 15 mm socket (pressing on the Doubler on the opposite side of the hole).  After the Bearing and sockets were lined up, I used a bench vice to “press” the Bearing into position.  This process worked out great.  Once the Bearings are set correctly, they will stick out just slightly on both sides of the Doubler.  The other two Brackets that complete the assembly have had a slight amount of material removed from the factory to accept the extruding Bearing.  You can see this area on the W-1013C-LX piece in the diagram left of the Bearing.

This is a picture of the Doubler after the COM-3-5 Bearing was pressed into the Doubler.

And here is the Left and Right Outboard Aileron Hinge Assemblies clecoed together.

Tomorrow, I will rivets these two assemblies together with the rivets called out in the plans.