Fairchild Club Forum

'Hey group,
Can the landing gear "streamlined" strut member be welded?
I have a cracked weld in one of the upper fittings that mate up with
the fuselage fittings. I understand from the manual Fairchild does not
recommend repairs. What's a guy to do?
Tom
Hanford, Ca
24R46'

'Tom,

See attached Fairchild SB 41-8. Yes you can weld, I would magnflux, tig,
magnflux, re-heat treat, prime and powdercoat the color topcoat.


Jamie S. Treat A&P/IA
Aircraft Restoration & Repair
24201 David C. Johnson Loop
Kelly Airpark
Elbert, CO 80106
HM/Shop 303-648-0130
JamieTreat@direcway.com

----- Original Message -----
From: "Tom Mueller"
To:
Sent: Thursday, May 12, 2005 5:41 PM
Subject: [fairchildclub] Landing gear....


> Hey group,
> Can the landing gear "streamlined" strut member be welded?
> I have a cracked weld in one of the upper fittings that mate up with
> the fuselage fittings. I understand from the manual Fairchild does not
> recommend repairs. What's a guy to do?
> Tom
> Hanford, Ca
> 24R46
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>


[Non-text portions of this message have been removed]

'

'Tom,
there is a procedure to do this but, you have to re-heat treat the gear leg
and that is were the problem comes in no one wants to do aircraft heat
treating liability issues. maybe some member has had this done.
John Berendt

----- Original Message -----
From: "Tom Mueller"
To:
Sent: Thursday, May 12, 2005 6:41 PM
Subject: [fairchildclub] Landing gear....


> Hey group,
> Can the landing gear "streamlined" strut member be welded?
> I have a cracked weld in one of the upper fittings that mate up with
> the fuselage fittings. I understand from the manual Fairchild does not
> recommend repairs. What's a guy to do?
> Tom
> Hanford, Ca
> 24R46
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>

'

'

> recommend repairs. What's a guy to do?
> Tom
> Hanford, Ca
> 24R46

I have a TIG and access to a large heat treatment oven, if some one
knows the process. temps and duration.'

'Thanks for your help guy's
I ran across a very interesting Website called "Mr. Tig" put on by
Wyatt Swain an EAA welding class instructor and aerospace welding
engineer.(www.tigdepot.com)
In the FAQ's section he talks about repairs to heat treated 4130
steels. I talked to him by phone and put the problem of cracks in the
Fairchild streamline strut to him. He said the procedure outlined on
the website for 4130 tubing repair would apply even though the
streamline strut material is bit thicker material. He also does not
recommend the oven method for reheating,as much damage can be done.
Just a local reheat with a neutral torch to relieve stresses brought
about by the new weld. This sounds like the way to go! I'm out the
door to find a good welder.
Tom
Hanford, Ca.'

'Perhaps a review of ferrous alloys and their heat treatment as
covered in AC65-9A is is order. Mr. Swain's response, as described in
your post, is in conflict and countradictory in just about every
aspect of the aforementioned FAA publication.




--- In fairchildclub@yahoogroups.com, "Tom Mueller"
wrote:

> Thanks for your help guy's
> I ran across a very interesting Website called "Mr. Tig" put on by
> Wyatt Swain an EAA welding class instructor and aerospace welding
> engineer.(www.tigdepot.com)
> In the FAQ's section he talks about repairs to heat treated 4130
> steels. I talked to him by phone and put the problem of cracks in

the

> Fairchild streamline strut to him. He said the procedure outlined

on

> the website for 4130 tubing repair would apply even though the
> streamline strut material is bit thicker material. He also does not
> recommend the oven method for reheating,as much damage can be done.
> Just a local reheat with a neutral torch to relieve stresses

brought

> about by the new weld. This sounds like the way to go! I'm out

the

> door to find a good welder.
> Tom
> Hanford, Ca.

'