On Wed, 18 Apr 2018 07:05:34 +0000, Eric Munk wrote:

It is not a question of what type it is or not. As gliders grow older,
they will show wear. And corrosion sometimes too. Mostly depends on how
it has been treated and stored, but also on for instance water bags
being tight, if it has been sitting outside for some time tied down etc.

The PIK-20 case is not alone. I have found similar corrosion issues in
the wings of a Standard Libelle and DG300. A thorough annual will
usually flush out any issues. If in doubt, use a boroscope to access
hard-to-get-to areas. Such as the wings from the opening inside the
airbrake boxes.

I get the impression that this winter, in the UK, has been worse than
usual for corrosion. It affected my Libelle's undercarriage more than I
expected (corrosion on the wheel, flaking paint on otherwise untouched U/
C legs) despite being in a dry grain barn for most of the winter.


--
Martin | martin at
Gregorie | gregorie dot org