I'm in the midst of the second annual inspection on my 360.  I've discovered
two cases of delaminations that I want to raise here.

The first is the trailing edge of the right elevator.  The seam between the
upper and lower halves has let go for a distance of about one foot midway
along the span.  It shows itself as a crack along the T.E. and is flexible vs.
the normal condition.  I now think this may be the source of my continuing
struggle with vibration at higher speeds (I thought it was gear doors but no
attempt there has been successful).  I've rebonded the halves together, added
some lead counterweight to balance, and will report back.

The second delamination is the counter weight attachment on the left aileron.
Specifically, it is the underside bid layer that wraps from the lead to the
vertical forward face of the aileron.  There are also three ribs here to add
stiffness to prevent the vibration Rick Argente encountered early in his
flight tests.  I had placed these ribs on top of the original bid layup and
then added additional bid to the ribs.  All of this has separated from the
front face of the aileron.  This front face, by itself, does not contact the
upper skin, there was no rib cap analogy here.  My bid layups were intended to
close this off and make the necessary front face to upper skin attachment.
Has anyone else seen this kind of separation?  I have not yet had a chance to
check the right aileron.

I'm wondering about causes.  My preflight includes moving the ailerons at the
surface and watching the stick move.  Just habit.  It was excessive
flexibility and squeaking that caused me to look into it.  Maybe the
counterweight is vibrating in such a way to cause the delam.

Any comments/ideas would be appreciated.

Ed de Chazal
N361DC