Short answer

The spar caps on a sailpane are often made of rovings. Rovings are
long strands of, in this case, uni fiberglass (lots of it) postitioned
at the thickest part of the chord, that extend from the spar roots to
an area usually just short of the tip of a wing. For optimum strength
they must be straight. If there are sections of the material that are
not straight, a percentage of the spar strength is lost. On some
DG300's some of the rovings were not laid in correctly, are not
straight,so there have been reductions on the operating limitations of
the sailplanes for safety reasons.

Mike


On Apr 9, 9:10 pm, "ContestID67" wrote:
After reading all this I am still unsure what is wrong. Can someone
paint (or draw) me a mental picture on what was manufacturered
incorrectly? Also, what is a roving?

Finally, I assume that only DG-300/303's that say ELAN on them are
affected.

- John