On 11-22-2010 13:36, JJ Sinclair wrote:
On Nov 21, 5:49 am, wrote:
Scott,

The 337 form can be sent in before the work begins. This allows for
approval/disapproval before a saw is taken to the airplane. I imagine
you will have to hire a DER (designated engineering representative) to
do an engineering analysis to accompany the 337. Harold Kasola is
very easy to work with and has Kasola Engineering in Albany, GA. A
call to him would be worth the effort. Having just certified a club
glider in experimental (last week), I can tell you it took a few days
and a trip to the FSDO.

No inspector is going to sign a 337 before the work is done and DAR/
DER's aren't cheap. I paid $750.00 for an airworthiness-for-export and
the guy wasn't here more than 30 minutes.
JJ

And I'm still having a hard time wrapping myself around the notion that
the FAA would be happy to change an aircraft airworthiness certificate
from standard to experimental for such a "small" change to the aircraft
and then turn over maintenance to the owner and just have an A&P sign
off a condition inspection yearly. Plus, I still think 337s are not
used to place an aircraft into the experimental category. For example,
a 337 (or STC) would be needed (I believe) to recover the wings on a
Cessna 140 that was originally covered with Grade A cotton when built
and certified and you recovered them with Stits.