I went and looked at a wing today that's been stored in a hangar for 15 years, from a plane that hadn't flown in decades. It looked great from the outside, and inside overall. The spar looks fine, but unfortunately the inside is full of surface corrosion like this. Mostly under the top skin near the ribs and, worryingly, the front spar. I've never seen corrosion like this where the products stay in one place, so I imagine it's due the lack of flying. The wing is stored leading edge down.
![[Linked Image]](https://www.cessna150152.com/forum/ubbthreads.php/ubb/download/Number/78880/filename/20230508_193655.jpg)
Leading edge showing some of the corrosion, looking outboard. You can see some of it appears to be on the front spar.
![[Linked Image]](https://www.cessna150152.com/forum/ubbthreads.php/ubb/download/Number/78881/filename/20230508_192738.jpg)
Trailing edge. This stuff is everywhere.
![[Linked Image]](https://www.cessna150152.com/forum/ubbthreads.php/ubb/download/Number/78882/filename/20230508_193450.jpg)
Closeup with an inspection mirror showing the seam between the upper skin and front spar. Not entirely pleasant...
I texted a few mechanic buddies for their opinions and none of them were sure exactly how airworthy the wing is and I should seek an expert's opinion. One of them actually called me to say it needs to be deriveted and cleaned at the very least, and I'm probably not going to find a wing that is fully usable without sheet metal work. I hope that isn't true, but it sure doesn't make me feel better. :P
Anyways, I showed my DAR friend and he says I should try contacting Cessna to see what they think. Anyone know how to get a hold of them for advice like this? I tried calling a number I found on Textron's but it wasn't of any use.
Last edited by N. H.; 05/10/23 04:04 AM.