B a r r y wrote:

Robert M. Gary wrote:

There is no requirement it be certified. It probably has a big sign on
the door that says "Experimental". Lots of those flying around all the
time.

I remember seeing a documentary with "Experimental" painted over the
door of the 777. As I remember from the show, Boeing flew it to lots of
airports for demonstration and testing purposes.

Of course. All new aircraft types start out as experimental. To a certain
extent, the same rules that apply to a 2-seater job built in somebody's
garage also apply to a jumbo jet. A big sticker on the door that says
"EXPERIMENTAL", no paying pax, etc.