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

Mich48041 12-05-2010 12:36 PM

Mandatory?
 
I received the same two emails. I do not think that you missed any. I agree with what you are saying, Marty. For those of us who have their aircraft flying and the test hours flown off, any change by Van's or Rotax is not mandatory for E-LSA or E-AB. We are required to acknowledge the notice and take action as we deem appropriate, not necessarily comply with the instructions in the notice.
Joe

dick seiders 12-05-2010 01:54 PM

Joe, I agree with your conclusion. As I said earlier I have settled on the blue Loctite, 360 in lbs and torque seal with a look at each oil change. Have decided not to go with the Nordloks as at this juncture am satisfied with the success of others using the Loctite.
I have started on my repair and am happy to report that at 43.6 hrs neither of the lower bolts have lost any ground. They still pop the torque wrench at 312 in lbs.
I have started on the top two, but have not gotten to check either as yet. Will provide results when I get them. I have a question on the ball style wrench Van's recommends. How much , if any, additional torque does this require? This was not addressed in the notice and repair procdure as the notice simply states follow the Rotax specs. which are 360 in lbs. Am I concerned over nothing on this difference?
Dick Seiders

MartySantic 12-05-2010 02:38 PM

Torque Wrench Calculation
 
Hi Dick.

I removed the drip tray. See my post a day ago. There was no way I would use a ball end allen at such an angle. My o-ring was not re-usable. Another is on order.

Since you mentioned it, I looked a bit on the internet and found the following illustration. Makes sense from simple physics but I have NOT verified the calculation. I have read many cautions with regard to using a universal joint and a torque wrench.

http://202.106.73.19/download/machin...8illd0e375.htm

Van's did not indicate any type of required adjustment due the angularity offset. Adjusting the torque wrench value if the axis of rotation is offset is WELL known. This is a bit different.

Call Van's engineering and ask. Let us know what they have to say.

Maybe Mel or one of the torque wrench gurus will comment.

Peterk 12-05-2010 03:42 PM

Mandatory
 
if a change was considered to be MANDATORY


Marty, Joe is right. You are now experimental and not required to follow UNLESS it is specifically mentioned in your own operating limitations that came with your own inspection by the Feds. Those are mandatory. And everyone's are not written the same.

MartySantic 12-05-2010 03:59 PM

Quote:

Originally Posted by Peterk (Post 491022)
if a change was considered to be MANDATORY


Marty, Joe is right. You are now experimental and not required to follow UNLESS it is specifically mentioned in your own operating limitations that came with your own inspection by the Feds. Those are mandatory. And everyone's are not written the same.

Agree.....BUT, there has to be a subset of builders where we were 15 months ago. Engine had been installed and then a month later, the notifications come from Van's to change the torque value. IS IT MANDATORY for them?

Peterk 12-05-2010 04:36 PM

Yes
 
Until they sign the Statement of Compliance which the DAR must see to certify the AW, they would have to, yes.

MartySantic 12-05-2010 05:45 PM

Thanks Pete. I NOW understand. I had to read their bulletin and then digest it. I am HAPPY, I think!

dick seiders 12-05-2010 06:21 PM

Thanks Marty. I will check out the math as best I can. Question on the use of ball allen wrench. I understand how you did the rt side w/o it, but were you able to do the left top w/o it as well? I am struggling with that. May weld one 8mm on top of another to try to avoid the ball on left side. How did you do it?
I will call Van's tomorrow on the torque question and provide feedback.
Dick Seiders

MartySantic 12-05-2010 06:29 PM

I did the same as Gary Eldrige did. Will send you an e-mail with a photo link. Not a perfect solution but it works. No need for a ball allen on the left side.

Will send my photo's and a discussion to anyone that wants them. e-mail me. Too many photos to post here.

Mich48041 12-06-2010 08:13 AM

Log book entry
 
I should have mentioned that for those of us already flying, we are required to make an entry in the aircraft log book whenever an AD or service notice is issued. The log book entry should mention the service notice and the corrective action taken, whether that action is in accordance with manufactures instructions or an alternative corrective action determined to be appropriate by the builder. If Mel is reading, perhaps he will comment and clarify the requirements.
Joe


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