Safety Directive SD-00001 for RV-12/12iS - Elevator Trim Servo

[Tony_T]

[hiline]

Thanks Tony !
Got it..

[Hairball192]

Jerre,

I'm in the same boat... Legacy RV-12 that is not flying yet. Trim motor is still in the box. I spoke to someone at Ray Allen Co. and they told me to send them the old unit with credit card info in the box and they'd send me a new unit for $90 plus shipping. Suggest you give them a call at 760-599-4720 to confirm.

Best,
Harry

[Tony_T]

Follow-up photos to my previous post -- adjusting the bushing/clevis fit on the servo shaft. Finger-tight, my clevis angle was about 45 degrees from vertical. Following plans suggestion I chucked the bushing into the drill press and touched it lightly several times to a sheet of fine emory paper, checking it as I went.


When the clevis was about 10° from vertical, called it good, applied the red LockTite and tightened the clevis to vertical while holding the servo shaft with the jam-nuts.


Ready to go back into the airplane:

This is a much more rigid connection to the servo than previously and a definite safety enhancement IMO. I could have let the old servo go for another 400 hours under the terms of the SD, but this is more prudent.

Since there are many reading the forum now who are not builders and have bought planes built by others, I felt it would helpful to do a photo narrative of this update.

[mikefox]

Yet again, fantastic write up Tony! Thank you. 😎👍🏻

[ChuckC]

Does the hole in the side of the shank of the Clevis have any useful purpose? I can easily run a safety wire thru it, and, it may be large enough for a cotter pin.

[Piper J3]

Originally Posted by ChuckC

Does the hole in the side of the shank of the Clevis have any useful purpose? I can easily run a safety wire thru it, and, it may be large enough for a cotter pin.

The hole serves the purpose of knowing the threaded shaft is sufficiently engaged. If hole is blocked by threaded rod - all is good.

[JwWright57]

Thanks for looking up all the parts guys you people are the best!

[Tony_T]

I got this update from another -12er. Apparently Bag 2670 now also contains the TFI-0304-04 plastic bushings and the little snap bushing, plus (4) LP4-3 rivets.



Maybe someone else can confirm this change?

[GatorsR1]

Yes, that's the contents of bag 2670 (got mine a couple of days ago).
Was just out in shop building the new assembly and surprised the brass bushing BUSH-BS.188X.313X.222 that goes on servo shaft behind the AN665-21R clevis rod end*wasn't included (the clevis rod end came off my old servo but the brass bushing is evidently a new part).
Dang me for not studying the SD and KAI enough and/or calling Van's to be sure I was ordering all I that needed.
Order for that brass bushing just submitted.