Okay, here is a little update on the maintenance program.
During the initial inspection a couple of popped rivet heads were discovered on a seam just aft of the right life raft door. The tape shows the offending fasteners that made us investigate:
The little door is where you reset the liferaft door latch mechanism.
I didn't take a photo of the bubbled paint, but around these two rivets was some bubbling that indicated corrosion on this skin. I scraped the top paint off and this is the final result of my poking around, taken during the disassembly process:
Notice the reddish coloration on the upper part of the skin--this is where a repair had been done many, many years ago, and I suspect that someone didn't properly prepare the new skin pieces before shooting them on. (Alodine, primer, etc.)
I cut off the corroded skin section and spent a fair amount of time fabbing a repair skin. It had to be recessed where the little access door fastens on, Dzus spring installed, radiused to fit the life raft door opening, blah blah. Imagine the "advanced aviation words" I let out when I found this:
NO $&&*%)_*^%$#)()_^^%*& EDGE DISTANCE ON THE BOTTOM!!!!!!!
Well, you know what that means:
Okay, this skin fits the airplane unlike the first attempt:
Clecoed on the turtledeck:
After getting everything fitted, drilled up, and trimmed, I cleaned the parts of the turtledeck that the new panel rivets to. The original structure was clean with no corrosion at all, which is a great thing considering the condition of that removed skin. I then alodined all the parts and laid on a coat of primer in preparation for riveting. This last photo is of the finished repair with the reset door installed.
Since I had to remake the skin, I didn't have time to shoot it together before it was time to load up and head for home.
More later,
Scott