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1. 01:09 PM - Re: Prop hub stud torque (Walter Lannon)
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| Subject: | Re: Prop hub stud torque |
Stephen;
I can not tell you what that torque should be since I have never seen the Yak 52
elevator bellcrank or the attached balance arm.
One of these bellcranks was just recently found cracked in my local area.
Visible (red) dye penetrant inspection may well reveal a crack but will not guarantee
that there is no crack.
Fluorescent dye penetrant inspection (FLPI) is far better but is still subject
to factors that could hide a very small crack.
Assuming that there is reasonabe access the best inspection method is Eddy Current.
This could possibly be done without removing the balance arm.
I would suggest you contact a reputable NDT company in your area for advice.
Walt
----- Original Message -----
From: Stephen Morrey
To: yak-list@matronics.com
Sent: Thursday, May 12, 2011 6:55 AM
Subject: Re: Yak-List: Prop hub stud torque
Can anyone tell me what the torque is for the 4 bolts in the balance weight bracket
attachment. I expect I need to pull the balance weight to dye pen the
bracket attachment?
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