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One tip that I have is to ensure that the the main
spar bolts are the correct length. If they are too long they will bottom
in the nut and not be tight. If you continue to tighten them you will
strip the threads. This is why I consider it is essential to use a
torque wrench. If I had just tightened them without using a torque wrench
I might have assumed that they were tight when in fact they were
not.
I had to cut the spar filler to access the nut
plate and fit a new nut plate. It was the inboard bolt left hand. I did
not enjoy the process.
I used the lowest torque value for a 1/2inch
bolt. I strongly recommend a check of the length of these
bolts. There is nothing but grief if they are the wrong length and you
install them. Interestingly only one bolt out of the four was too long by
about 1/8th inch.
Somewhere in the archives is my original
post.
Ian Crowe
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