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-   -   SB 18-02-02 Potential cracking in the horizontal stabilator front spar (https://vansairforce.net/community/showthread.php?t=157839)

Piper J3 04-05-2018 05:19 PM

Quote:

Originally Posted by Tony_T (Post 1251164)
It looks like the aluminum would still be slightly sacrificial but for a corrosion cell to form there would have to be an electrolyte present.

Tony, you live by the ocean, so salt air with lots of rain in the PNW would be a consideration...

Tony_T 04-05-2018 09:12 PM

Rain?
 
Quote:

Originally Posted by Piper J3 (Post 1251171)
Tony, you live by the ocean, so salt air with lots of rain in the PNW would be a consideration...

What rain?


RFSchaller 04-08-2018 06:18 PM

Seems like steel and aluminum are in contact at many points in an aircraft. I?ve never heard of it being a problem. Has anyone else?

rv9builder 04-08-2018 08:30 PM

Hi Rich,

Yes, I?ve heard of it being a problem with some PA-28s. Here?s a very sad news story and a video that shows how badly aluminum and steel corrosion can be.

https://www.avweb.com/avwebflash/new...-230590-1.html

https://www.youtube.com/watch?v=-D5vCoWKgII

pilotyoung 04-09-2018 04:14 AM

Cracks
 
All of the posts and pictures are very helpful. I have not started mine yet. I am wondering how many owners have actually found cracks after doing the inspection?

Thanks.

rv9builder 04-16-2018 11:22 AM

Removing rivet stems
 
Quote:

Originally Posted by JwWright57 (Post 1249057)
I hear you Tony! I had to re-rivet one of the anti-servo hinges and ended up with the rivet tails inside the stabilitor. I cleared them out with a magnet on a long stick and a LOT of fishing around. It was a real PIA. :mad:

Has anyone found an easy way to remove the rivet stems after drilling out the rivets for the service bulletin? Amazon.com has several magnetic pickup tools that look like they might be helpful. Has anyone tried one?

Thanks,

ben barron 04-16-2018 12:52 PM

while one of us rotated the HS around the other caught the moving remnants... took 5 minutes...not a big deal

Jim T 04-17-2018 07:25 AM

I installed the stabilator fiberglass tips at the same time. With the end ribs removed I tipped the H.S. on to the leading edge so the rivets went to the front and then up on end and out the rivets fell out.

rv9builder 04-18-2018 10:41 AM

Thanks, Ben and Jim. I appreciate your suggestions!

AirHound 04-22-2018 09:21 PM

Thanks to a skilled builder, Tom Delaney, another completion. With his able assistance the project took us 14 hours only because of me tromping around. But as they say time flys when you are having fun.

All tips in this thread were useful. We stacked some boxes and cushions on two HF rolling carts and lashed the HS down to work on it, turned it over and same. Then slid it back into place and one person pushed up a 1/2 inch and forward, and the other used a modified/tapered bolt to align the hole and pulled it out with the other guy holding it up from below and the bolt with a little jiggle went in easily on both sides. Only knocked one washer loose but used a washer wrench on it rather than start over glueing..saw evidence where previous owners used some kind of thin looking masking tape to afix the washers. I think the idea is to push the bolts through the taped washers and leave it lay. I guess it worked and so did the super glue unless they get knocked around during reassembly/alignment. Then again maybe the tape would take a knocking better? Not sure.

Other than lucking out with a skilled assistant and this great web site with all the tips, I can’t image anything to add except ENJOY this little confidence building project.

V/r Doug


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