Cracked flap hinge butt rib cont

Today I continued to work on the cracked flap hinge butt rib on the Left wing. I removed the “Edge Assy” 108-1111045-0 which then allowed me to get into where the butt rib is. 

Removing this was a PITA. The PK screws were rusted in requiring me to use penetrating oil to loosen them up. Then I had to purchase a LONG 1/8” drill bit bc there are about 5 rivets right beside the hinges which makes it hard to get your drill in there. 

Flap trailing edge assy.

The cracked rib is at Station 46 as measured from the root. 

Measured from the wing root

Station 46

There are about 30+ rivets holding this butt rib. The rib is not only riveted to the Spar, but also to the main rib with doublers. 

Cracked butt rib

Parts catalog

Parts catalog

Control attachements “Felt washer”

Today while working on the cracked butt rib, I noticed something about the hardware that holds the flaps on the hinges. 

Each hinge has a “bearing/bushing” where the bolt goes through the Hinge. This bushing protrudes outside and wider than the hinge it self. There is a Felt Washer  that goes over the bushing.

P/N 108-8001001 Felt Seal (2 required per hanger)\

Showing washer

Washer installed

Example of what this felt washer looks like new, thanks to

Wing storage.

I found this on FB (Robin Ange), it is a great wing storage system that not only holds both wings, but all of the lift struts too.

The one pictured was built so it could be unbolted, and torn down to store or ship. Apparently this has been used many times to ship wings from the US to Germany.


Spar tip update

I worked on the Spar tip a little today, I got the drag wire attach point fitted and drilled. Cleco’s holding it for now, but I do need to drive some 5/16 rivets next.