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-   -   RV-12: Engine Mounting Cap Screws Inspection (https://vansairforce.net/community/showthread.php?t=65020)

Geico266 12-01-2010 04:51 PM

Tony, You are on the right path to reduce the OD of the Norlock washers. Take the mandrel set up you have in the drill press and put it in a hand drill. With the drill spinning in the opposite direction of the bench grinder gently touch the washers on a spinning wheel. Dress the grinding wheel of the bench grinder so the wheel is clean and true. Go slow and square to the wheel and you will achieve a very nice result. Use the spinning 3M wheel to debur up the edges.

Let us know how it turns out.

rschy 12-01-2010 06:53 PM

If anyone has any doubt about how Rotax feels about Loctite check out the maintenance manual 05-00-00 page 7;)

vernhendershott 12-01-2010 07:24 PM

Got to do the check on 120186 today, the upper left and lower left were tight, the upper right required about 1/8 turn to come back to full torque and the lower right was missing.

Found that it was necessary to remove the right drip pan to get a proper tool to the upper right bolt.

The plan is Loctite 242 and return to service. Then watch every 25 hours for at least 100 hours.

Best regards,
Vern

Mich48041 12-01-2010 07:34 PM

How many hours?
 
Vern,
How many hours are on 120186?
Thanks,
Joe

clucier 12-01-2010 07:41 PM

OK missing is not something I want to hear at all regarding an engine mount bolt. How many hours?

Quote:

Originally Posted by vernhendershott (Post 489879)
Got to do the check on 120186 today, the upper left and lower left were tight, the upper right required about 1/8 turn to come back to full torque and the lower right was missing.

Found that it was necessary to remove the right drip pan to get a proper tool to the upper right bolt.

The plan is Loctite 242 and return to service. Then watch every 25 hours for at least 100 hours.

Best regards,
Vern


Brantel 12-01-2010 07:56 PM

Quote:

Originally Posted by vernhendershott (Post 489879)
snip....lower right was missing...snip

Best regards,
Vern

:eek: Wow! Keep finding this stuff and we may see our first AD issued against Van's...

I wish you guys the best of luck finding a fix for this one!

Falling out is really bad but so is a loose bolt in there wallowing out the hole. That sure is an expensive case to have to replace or repair...As well designed as the rest of the RV12 seems to be, this shocks me that this was put out there this way.

DonFromTX 12-01-2010 07:58 PM

Think of the poor slobs flying around in 12's that are NOT on this forum!

Geico266 12-01-2010 08:02 PM

Quote:

Originally Posted by DonFromTX (Post 489896)
Think of the poor slobs flying around in 12's that are NOT on this forum!

If you know of any please make every effort to contact them immediately!

MartySantic 12-01-2010 08:08 PM

Quote:

Originally Posted by rschy (Post 489870)
If anyone has any doubt about how Rotax feels about Loctite check out the maintenance manual 05-00-00 page 7;)

I reviewed the ROTAX Line Maintenance page. What are you trying to tell us?? It is merely a list of consumables??? The manual SPECIFICALLY tells us when and when not to use loctite.

In the case of the engine mount bolting, all of the USA repair centers seem to be using blue loctite for this bolting even tho the line maintenance manual does NOT suggest it.

vernhendershott 12-01-2010 08:25 PM

Sorry I should have indicated that 120186 has just under 40 hours total time and the 25 hour inspection was done by Lockwood, they did not check the upper left as the shroud was not moved, they may have checked the others or not.

Best regards,
Vern


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