On Mar 16, 9:38*am, lanebush wrote:
I am researching the IS28B2 Lark for our club. *From what I can tell
these aircraft reach their life limit around 2014. *Am I correct in
this deduction? *The info is pretty scarce. *In fact I can not find a
copy of EO-24 anywhere on the web. *If this is true, is everyone
planning to convert to experimental catagory? *Am I correct in saying
that under experimental catagory commercial operations will not be
possible?

Thanks for any input.

XF

Larks have gone through multiple life extensions, which have little or
nothing to do with airframe hours, but do require calendar-based
special inspections. It's more like a shelf-life. Anyone know if 35
years was the final extension? The example you are looking at
apparently was built about 1978, but construction continued into the
mid-1990's. There are a couple for sale on segelflug.de built in 1988
and 1989 priced at 8000E each. There are a couple of L-13's on there
also you might look over if in your price range.

FWIW, some Aussies did a study on three high-time Larks several years
ago and presented to OSTIV. IIRC, they concluded aerobatics should be
stopped at 14,500 hours. I know about one here in the US that had the
skin separate from the spar due to water in the wings freezing and
thawing in western Colorado. That was repaired and it is operating
with a club in the south. Corrosion seems to have been the major
shelf life concern as many were left tied out instead of protected.

Frank Whiteley