New SB (SB-G09) on elevator pushrods for most all Grobs

With my Astir CS I didn't have much difficulty:Â* removing the lower
rudder bolt was done with a 10mm open end wrench used vertically and the
pushrod bolt went loose easily (= normal force applied). Lindner even
added three new nuts with the ste I ordered.
No moisture and no rust inside the rod, so no problem...

Okko (Netherlands)


Op 8-8-2020 om 5:14 schreef Larry Ruggiero:
Our Astir 102CS was a bit of a bugger to access. We removed the rudder, which was easy enough, but that pushrod lower clevis thru bolt was tough. It took two of us and a special long 1/4� drive wrench to remove and replace. We erred on the side of caution ahead of time and ordered a new one via Roger Mudd. Was north of $500. Turns out our original one was fine. Note that not all 103’s are affected—ours isn’t.

Larry Ruggiero, Carolina Soaring Assoc, Spartanburg SC

On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

The lower rudder bolt picture that I took isn't very good. There is some some access near the bolt head and nut but not enough to get wrench on them. We are going to do some fine Dremel dental work to get access.

Modify a tool, not the glider.

Schleicher rudders have a hole in the bottom so you can get a socket with extension on the nut. Don't have a Grob handy at the moment to see. We had no problem removing the rudder from the club Twin.

Forceps might be helpful putting it back together.

On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

Our club member and retired toolmaker had to modify some box wrenches to remove the lower rudder bolt. A small amount of Dremel work was still needed to gain access. Removing the elevator pushrod bolt is no easy task because of the tight access. Elevator pushrod was extracted and the required 6 mm hole drilled. No water or corrosion found in the pushrod. Awaiting inspection, reassembly and logbook entry by our A&P.

Chuck Zabinski

On Saturday, May 9, 2020 at 12:18:13 AM UTC-7, wrote:
On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

Our club member and retired toolmaker had to modify some box wrenches to remove the lower rudder bolt. A small amount of Dremel work was still needed to gain access. Removing the elevator pushrod bolt is no easy task because of the tight access. Elevator pushrod was extracted and the required 6 mm hole drilled. No water or corrosion found in the pushrod. Awaiting inspection, reassembly and logbook entry by our A&P.

Chuck Zabinski

Thanks for the update! Had a quick look at mine and it is a bit tight around the lower bolt of the rudder. Does your Astir CS have the "welded" type or the "riveted" type pushrod?

On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

Our Grob 102 Astir CS had the "welded version" elevator pushrod consistent with the Service Bulletin.

BTW: All the hardware requires 10 mm wrenches. The elevator pushrod bolt & nut required a modified box wrenches.

Chuck Zabinski

Could you give some information on the required tool modifications?
Thanks.
OK


9-5-2020 19:52 wrote:
On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

Our Grob 102 Astir CS had the "welded version" elevator pushrod consistent with the Service Bulletin.

BTW: All the hardware requires 10 mm wrenches. The elevator pushrod bolt & nut required a modified box wrenches.

Chuck Zabinski

On Sunday, May 10, 2020 at 2:55:29 PM UTC-4, okko kloosterman wrote:
Could you give some information on the required tool modifications?
Thanks.
OK


9-5-2020 19:52 wrote:
On Tuesday, May 5, 2020 at 10:17:09 AM UTC-4, soaringjac wrote:
See the link below

http://www.ltb-lindner.com/g-102-ad-...rod_200408.pdf

Our Grob 102 Astir CS had the "welded version" elevator pushrod consistent with the Service Bulletin.

BTW: All the hardware requires 10 mm wrenches. The elevator pushrod bolt & nut required a modified box wrenches.

Chuck Zabinski


The 10 mm box wrenches were ground down to thin the outer circular support structure that supports the gripping teeth. This lets the wrench fit into bolt access recess in the rudder. Even with that, a slight amount of Dremel work may be required to get the wrench to fit on the bolt nut. Also small hands and patience are required to remove the elevator pushrod bolt.

Chuck Zabinski

So did anybody find any evidence of corrosion inside the pushrod ?