Notification 17-05-19 Soft Engine Isolators

[Dave12]

Originally Posted by rvbuilder2002

E-mails are only sent out for Service Bulletins

A Notification is only issued for things that are not safety of flight concerns.

The soft isolators can not be over compressed because there is still a spacer that the bolt torques up on.

Scott, can you elaborate on what lead to this notification?

[BigJohn]

Originally Posted by todehnal

.......By the way, I have no purple dot, no white dot, and no raised text, for what it's worth. I may see some evidence of them when I get the old ones out, but I carefully worked my way around all four front and back rubber mounts using a mirror and found no markings at all.

Today I did the same and saw no raised letters. Then my grandson took a look with his younger eyes and claims to see what might possibly be the very edge of some letters peeking out from under the metal part of the mount. I am going to have to dissassemble at least one of them to see for sure if there is lettering buried in there. Tomorrow......

BTW, if one of the four mounts is found to be of the "good" type, does that mean that one can assume that all four are good? Or could they be from two batches in the same kit?

[todehnal]

Originally Posted by BigJohn

Today I did the same and saw no raised letters. Then my grandson took a look with his younger eyes and claims to see what might possibly be the very edge of some letters peeking out from under the metal part of the mount. I am going to have to dissassemble at least one of them to see for sure if there is lettering buried in there. Tomorrow......

BTW, if one of the four mounts is found to be of the "good" type, does that mean that one can assume that all four are good? Or could they be from two batches in the same kit?

John, the bulletin states that if raised text are found on one half of an isolator, that isolator is considered good, but not all of them. So, basically you need to find raised text on at least one half of each isolator, At least that is the way that I read the notification document.

[BigJohn]

Good morning. Hopefully Scott will weigh in on this question. I dont want to have to take them ALL apart just to see.

[todehnal]

Hey Ueli!

Do you remember how much room you needed to get the old isolators out, and the new ones in? Would it be more or less than an inch? I'm trying to figure out how much slack I will need in wiring, hoses, etc. It would probably be best to create sufficient slack first, rather than deal with a tight wire or hose later.
Thanks..............Tom

[todehnal]

Originally Posted by MMiller

Six hours is about right to change these out

Bigjohn i don't know how well this will work, can you make an impression with modeling clay (or something similar) of the obscured side of the rubber isolator?? I would check all four.

Mike

Thanks for the tips on changing these out. Always nice to hear from someone who has been there, and done that.

Actually, with a small mirror and a light I was able to see all the way around most of the isolators.

Tom

[rvbuilder2002]

Originally Posted by Dave12

Scott, can you elaborate on what lead to this notification?

It was discovered that at some point the supplier had mixed in an alternate part with at least one shipment of parts to Van's.
At the time of discovery, there was info that indicated that delivery of the incorrect part was isolated to a specific time frame, but additional information obtained later indicated that it was wider than that time frame.

If I remember correctly the parts are individually packaged (not in a boxed set of four) so the recommendation is that all four on an RV-12 should be checked.

[BigJohn]

Originally Posted by rvbuilder2002

.......If I remember correctly the parts are individually packaged (not in a boxed set of four) so the recommendation is that all four on an RV-12 should be checked.

Thanks Scott. With more careful examination using a small mirror and strong light I was able to positively identify one mount, and see partial raised lettters and/or white dots on the other three, enough evidence to satisfy me. I think I am good.

[todehnal]

Since my new isolators arrived from Van's yesterday, I changed mine out today. Not a bad job at all. I took the battery out, the air filters off, and needed to move the engine mounted adell clamp that holds the cabin heat cable in place. And of course, you have to open up the front of the tunnel to gain access to the bottom bolts. The only help that I had was when I called my daughter out to hold the bottom bolts from turning that are inside the tunnel, and to swap out the sandwiched isolator pucks while I jiggled the engine around. All the rest was a one man job. Yes, it took me less than 6 hrs start to finish. I was pleasantly surprised with how well the project went. Don't be shy guys. Oh, I do have a small engine hoist, which in my opinion is a must, and don't forget to support the tail before cutting the engine loose. Hope this helps...........Tom

[David Paule]

Where can I find a copy of this notification?

I looked and didn't see it in the RV-3 section, the -4, -7 or -10 sections.

Thanks,
Dave
RV-3B now skinning the fuselage