View Full Version : Piper Spar splice Kit Pa 12

01-10-2005, 12:45 PM
What is this? What's it mean when an aircraft has it?

01-10-2005, 12:53 PM
It means that the spar has been spliced somewhere. Maybe due to damage or maybe a wing extension mod.

01-10-2005, 06:53 PM
I understand the splice,but a "splice Kit" from piper?

01-10-2005, 07:00 PM
From my own experience, it should not really be a great cause for concern, if they were installed properly - I will gladly stand corrected.

We had a 1940 J-5A which was our first "Cub" with a 180 HP using X-Winds mount. After all, it was a "Piper Cub Cruiser." It had wooden spar splices from June 1940 when my grandfather put the plane into the trees in Spencer Mass - on a gusty day with 3 people and 75 HP. We replaced the rear spars for condition, but never touched the front left which had an original 1940 wood splice.

We gave this plane a 40th birthday party in 1980. Well, any excuse in the goood old days.

We used metal spar splices from Univair for our wing extensions on our PA-12 and they seem to work really well. Wood and metal are two VERY different animals. Just my 2 cents worth.

While I'm here, I want to say that we've had really good luck with the X-Winds STOL 180 set up, which we've used about 5 times. :-?

01-10-2005, 07:43 PM
At one time Piper offered a spar splice "kit". It consisted of spar splice plates, rivets and spar section.
I agree with Stearman 600, if the splice was done properly, it's just as good as the original spar. I use spar splices on my wing extensions also.

01-10-2005, 10:21 PM
I've used them. You can splice Piper metal spars outboard of the lift strut attach points. The Piper Kit came with a section of spar material, the plates to attach the two pieces of spar together with and a bag full of rivets.
See Piper Service Memo No. 3A.
If they were done properly, I wouldn't worry a bit about them.

Steve Pierce
01-10-2005, 11:02 PM
Univair sells them. I have done the splice with no problems. It looks like over kill after you shoot all those rivets.

01-11-2005, 05:38 AM
Thanks, I will find out where the splice was made and why.

01-11-2005, 09:40 AM
Remember, the splice is only legal if it was made outside of the wing strut attach brackets.