With the shell off we could pull the frame out from underneath. We had to move the gantry system forward so it was located over the frame. The crane hoists were attached to the tongue and bumper of the trailer and the frame was flipped over. The bottom of the Airstream has what is known as a belly pan. It is aluminum sheeting that encloses the bottom of the trailer and frame.
As Mr. C removed panels of aluminum, I removed insulation, mud, pine cones, candy wrappers, insects, bee hives, etc. Fortunately no mice or carcasses were revealed. There was a tangle of electrical wires. The trailer did not have a gray tank when it was manufactured. At some point someone connected the kitchen sink, shower and bathroom sink to the black tank. Unfortunately they cut into the cross members of the frame and they were all broken.
Once everything was stripped from the bottom side of the frame, it was flipped back over and placed on its tires. The plywood we had put in as a temporary floor was removed. We then removed the “C” channel. Construction of the Airstream is unusual. You have plywood located directly on the frame and then aluminum channels approximately 1.5″ wide (“C” channel) are fastened to the top of the plywood with screws and bolts that go through the frame in selected locations. There are also carriage bolts counter sunk into the plywood and secured to the cross members. The aluminum shell gets attached to the “C” channel. Therefore, the aluminum and steel do not touch. If the metals are in contact, it get corrosion. We removed all of the screws, bolts and “C” channel. The original plywood on the front and rear edges was crumbling and we made a paper template of the curves before removing the plywood.
The frame was very rusted and most of the cross members were broken. We were hoping to salvage portions of the frame. However, after removing the axle and seeing gaping holes in the side rails it was decided to construct a new frame. Off to the steel yard for more steel. Axle is on order.