On 19 Dec 2006 16:03:23 -0800, "Robert M. Gary"
wrote:

snip

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.

Anything other than a field overhaul will have been tested for static
horsepower and "run-in" in a test cell according to the mfg's
instructions.

Other than major airframe repairs after a wreck (and certain
autoflight system repairs), I have never signed off/or required a test
flight.

Personally, I don't think a brand spanking new engine-out landing will
be "appreciably changed" from a whipped 20something year-old
engine-out landing...

TC