The Cessna 120-140 Association Forum

Hi all:

Casually looking at a C-140 project that was over on it's back at one time. Fuselage crinkled behind the rear spar as noted in photos. Doubler installed to reinforce the crinkle. It appears by 43.13 this doubler would be an approved repair (assuming done correctly and documented on a 337). My questions:
1. Does this repair look even remotely correctly done, and
2. Would (should) the fuselage have been put in a jig to ensure it was not twisted and/or bent in such a way as to alter the flight characteristics of the airplane.

I know it's impossible to "diagnose" any problems or repairs by photos, but would just like the opinions and thoughts of those much more competent than myself to evaluate this.

If it appears it might be OK, I will go take a look at the airframe in person and also review all the logs and paperwork.

Thanks!

Todd Littfin
Member 8024
1947 C-140 N4112N S/N 14025

Todd,

I would have tried straightening it as best I could before putting the doubler on the inside. If I could not get it straight enough I would have cut out the worst and then put a patch in. Just me.

If there was a ADF mast just above the windshield on the cabin roof, put a straight edge on it to see if the forward spar carry through is bent down.
That is what I found on mine.

Good luck,

Rick

There is certainly a lot going on there. Might want a good Metalsmith to take a look at that, for sure.

Thank you gentlemen for the advice. Certainly agree it warrants further review.

Kind regards,

Todd Littfin

What about just pulling that entire section of skin off and duplicating it? It won’t be that hard for a good sheet metal guy. Hard part is some of the rivets in door post and do a nice “slight flange” on window. I helped a mechanic make that skin and it wasn’t as difficult as I thought it was going to be.

Agree on the reskin. Thanks all for the information. the airplane has sold (and not to me).

Have a great day all!