The following Service Bulletins have been revised 33, 35, 56, 57, 20 and are available at www.Univair.com
Site Updated February 25th. 2014
Wright, Sr.'s comments
begin with you cannot see the entire area of the center section with the wings
on. The area on the center spar behind the wing tank cannot be inspected &
this is where we are finding the most corrosion. My son & I have been
working on Coupes for several years & have found the following Coupes to
have corrosion in the center section:
had a 4" piece of the lower spar cap missing
you would like you can come to Springfield, IL & look at these parts as we
my experience if it has no corrosion it would take at least 5 years for
corrosion to occur. The cost would be about 4 or 5 hours of labor to pull wings
off inspect & put the wings back on.
A. Wright, Sr.