In article . com,
"Robert M. Gary" wrote:

Isn't that required by regulation (although only minimum crew is
allowed)?

Not that I've heard of.

Section 91.407: Operation after maintenance, preventive maintenance,
rebuilding, or alteration.
(b) No person may carry any person (other than crewmembers) in an
aircraft that has been maintained, rebuilt, or altered in a manner that
may have appreciably changed its flight characteristics or
substantially affected its operation in flight until an appropriately
rated pilot with at least a private pilot certificate flies the
aircraft, makes an operational check of the maintenance performed or
alteration made, and logs the flight in the aircraft records.

How would an engine overhaul have changed the aircraft's flight characteristics?

Seriously, I really don't see how 91.407 requires a flight test. Heck, even the
STC to install the 160hp engine in my cherokee didn't require a flight test.

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