In article 000301c723dd$b2e364e0$e302a8c0@omnibook6100,
"Jim Carter" wrote:

Why would the STC have to require a flight check is one was required by
FAR? I can easily see how an engine overhaul or upgrade (per STC) could
change flight characteristics.

For the same reason the STC included instructions to file a 337?

--
Bob Noel
Looking for a sig the
lawyers will hate