SB-00023 published: RV-12/12iS Engine Mount Standoff Inspection/Replacement - Page 9

whity1231$ · #81 01-21-2021, 11:06 PM

I did what others suggested, safety wired them together. If you have to, use a longer bolt.

Bob Y · #82 01-22-2021, 07:24 AM

And use AN3 bolts instead of #10 screws where possible. Easier to tighten.

JwWright57 · #83 01-22-2021, 07:18 PM

Quote:

Originally Posted by Bob Y

They’re castellated nuts with Cotter Pins, no not an issue.

Castellated nuts? I don’t see that

Bob Y · #84 01-22-2021, 09:30 PM

See post #39. They’re Castellated on the iS mount.

JwWright57 · #85 01-23-2021, 08:15 PM

Quote:

Originally Posted by Bob Y

See post #39. They’re Castellated on the iS mount.

Sorry Bob, but i just don’t see that. What plans page has that? This pic is the latest version i could find.

Bob Y · #86 01-23-2021, 09:27 PM

Quote:

Originally Posted by JwWright57

Sorry Bob, but i just don’t see that. What plans page has that? This pic is the latest version i could find.

See page 5 of the KAI that came with my Powerplant kit.

https://www.dropbox.com/s/q75bmihfb3...stall.pdf?dl=0

DaleB · #87 01-24-2021, 09:19 AM

Mine (S/N 120222) uses castellated nuts and cotter pins. In one of the Skyview installation sections I found a picture of one of the factory planes that showed the same part attached the same way. I don't know when they made the change, but originally they used cotter pins.

JwWright57 · #88 01-24-2021, 12:08 PM

Quote:

Originally Posted by Bob Y

See page 5 of the KAI that came with my Powerplant kit.

https://www.dropbox.com/s/q75bmihfb3...stall.pdf?dl=0

Thanks Bob. The engine kit I received around Christmas has locknuts and a revison for that page (8/19) .

Which is good lol since thats the hardware they sent me.

Bob Y · #89 01-24-2021, 03:03 PM

Received mine May of ‘19. Maybe Scott can share what prompted the change?

rcarsey · #90 01-25-2021, 01:07 AM

Quote:

Originally Posted by Bob Y

Received mine May of ‘19. Maybe Scott can share what prompted the change?

I second that! Mine uses cotter pins. The only issue I had was that after torqueing, I couldn't install the cotter pin for 2 reasons.. the castellation didn't line up with the drilled hole (when does it ever!?), and also there was interference between the standoff and the cotter pin during insertion.

I had to make sure the bolt's drilled hole was up/down and not left/right. So maybe with locknuts, there's a better probability that builders will get the torque closer to spec.. ?