View Single Post
  #4  
Old May 18th 11, 11:00 PM posted to rec.aviation.soaring
JJ Sinclair[_2_]
external usenet poster
 
Posts: 359
Default Cobra top hinge plate bolt failure


The top will move with the struts fully extended and the bolts
removed. *Even with one hinge outboard bolt removed that corner of the
top rises and it look 5 of us to align the parts to get the
replacement bolt in. (people were available and clamps were not)

Please clamp the parts together so they can't move and then only
remove one bolt at a time.

Andy


Yep. the inboard bolts came right out and looked fine, but the
outboard bolts didn't want to come and I wasn't inclined to force the
issue. A gap between the hinge plate and cross-member did appear as I
loosened the nut. I believe the outboard bolts fail after the bolt is
loose and repeatedly banged around (up & down + for & aft). Once the
outboard bolt gives way, the inboard isn't long for this world. I
think we're OK if the bolts are tight and kept tight.
Cheers,
JJ